Think of yourself as a desert ant. You leave your nest to search for food early in the morning in the deserts of Tunisia, except you do not know where to find food. You, therefore, walk randomly in the desert in a circuitous outward path from your nest until you find food. If you would find food, how do you get it back to your home? How do you go back without having left for yourself any traces or signs in the wasteland, without knowing where you located, and most importantly, without ending up stranded in the scorching heat of the desert? Could you accomplish coming back each day with food? Well, desert ants can.

To find out how ants can do this, scientists observed their behavior, and surprisingly they have found that ants did not follow back on the same trail they randomly took after they left their nests. Instead, ants took a direct route as if they already knew where the nest exactly located. How do these ants find the closest way and shortest distance to their nest from their current locations? Former studies had found that red and forest ants secrete a chemical substance to mark their paths. They leave a trail of chemical scents or visual traces behind them—like leaving a trail of breadcrumbs to help you find your way home. However, the structure of desert sands and conditions are not consonant with containing chemicals that will carry an odor or leave visual cues. Even if such markings have made, it is hard to guarantee that they will remain intact long enough considering the harsh conditions of the desert. As in Hansel and Gretel fairy tale kids who could not return home for the breadcrumbs they had left on the trail eaten by birds. Therefore, these desert ants must be equipped with another cognitive mechanism so that they can return to their nests before succumbing to the midday heat.  

Black desert ants (Cataglyphis fortis) emerge from their nests in the heat of desert sand, which rises to 70 degrees with the rise of the morning sun, to search for the remains of other insects that were not as heat resistant as they are. They can only survive for one hour on the hot sand and under the blazing sun, which means that within an hour, they must find their food and bring it back home without getting lost. The journey is quite arduous and dangerous each day. If the slightest confusion occurs and they are not able to return to their nest in time, then it could cost them their lives.

Scientists conducted a series of research in the scorching deserts of Tunisia to find out how desert ants take their food to their nests in the shortest route possible. Researchers first determined an anthill and plotted the terrain around it to set up a coordinate plane. They observed that the ants left their nests very early in the morning to begin their daily search for food, and many of them eventually found grubs that had been planted by the scientists. However, researchers moved the ants to locations that they had not previously been to after the ant began carrying the food back to their nests. The attempt was to understand whether there was a “sign placement system” within the ants. This system would encourage the ant to find its last known location, in this instance where it had picked up, then find its way back home. However, the ant instead began heading directly to its nest. It was as if the ant determined its position concerning its nest and set off for it immediately. This experiment was repeated on many ants numerous times and with the same consistent results. The ants, as soon as they had placed on the ground, moved to the nest relative to there. With a wondrous intrinsic coding of some neurons in their nervous systems, they traveled the distance between their new location and the nest in the shortest way possible. In addition to this, the margin of error was very nominal; they found their nests with a ten percent error in the average distance of 500-meters and with an error of only two degrees in angle. Additionally, a fascinating discovery revealed that the ants could calculate errors in their navigation systems. As they approach their destination, they would make adjustments if they need to by moving back and forth in parallel lines to reach the nest with minimum error.

Scientists determined that desert ants have about a thousand lenses in their compound eyes (remember that a human eye has only one lens) and 80 lenses in each of their eyes that can detect polarized light that comes from different points in the sky. Polarized light occurs when sunlight enters the atmosphere of Earth, hits air molecules and other particles, and then scatters in all directions. This dispersion leads to polarization, and the light that starts to vibrate in many planes begins to vibrate in only one plane. Therefore, the strongest of them is a distinct polarization that always makes a 90-degree angle towards the sun. The lens system in the eyes of desert ants uses this polarization to form a kind of Sky Map. These ants will occasionally stop and robotically move their heads while returning to their nest. This brief period allows the ants to make this sky map by surveying the sky and making a mental note of its layout. Researchers believe that ants can then calculate the direction that they need to travel to return to their nest. They repeat this movement along the way to continually update their sky maps. If they cannot find their home, then they utilize a patterned search method with a set of circular motions. It means that each ant knows how far it is from their nest at every point of their journey.

Then, how do ants find their direction to the nest? Perhaps they were guided by the position of the sun in the sky is. To test this hypothesis, researchers placed a set of mirrors to make ants perceive the sun in a different state than where it ordinarily would be. It observed that the ants changed their directions according to the new state of the sun. However, this finding raised another question; researchers wondered how the time of day would affect the ants since the sun moves across the sky during the day. However, this finding raised another question; researchers wondered how the time of day would affect the ants since the sun moves across the sky during the day.

In another part of the experiment, the researchers caught the ants after they found the bait, closed a box over them, and kept them inside the box for several hours so that they could not see the sun and its movements. It expected that the ants would have trouble finding their way back after they were released since a long time had passed, and the sun was in a drastically different position in the sky. However, they once again returned home by using the shortest distance possible. It understood that the desert ants were aware that time was passing even though they could not see the sun.

We now understand that ants determine their direction home by using the sun, but we still do not know how they figure out the distance they must travel to return to their nest. Researchers have developed three hypotheses to explore this phenomenon. The first hypothesis was the energy hypothesis. According to this hypothesis, the ants were able to know how much energy they needed on the way back by calculating it they had spent until they reached their food. The depletion of their energy meant the end of their journey. An ant loaded with extra weights to test this hypothesis as soon as it reached its food. The scientists thought that if their body weight increased, then they would not be able to strike reach the nest since they would spend more energy on the return trip. However, in this case, it did not affect the ants, and they returned home in the shortest way possible regardless of their weight.

The second hypothesis was the optical-flow hypothesis. In this hypothesis, it believed that the ants had visual memory, and this was how they remembered the way back. To prove this, scientists prevented the ants from seeing their surroundings by blindfolding the ants when they found their food source. However, the blindfold did not prevent the ants from obtaining the shortest distance back home. As a follow-up to this experiment, the researchers placed an extensive television screen in front of the ants showing an endless desert on the television screen to make the ants feel as if they had crossed the entire desert in this simulation. They used various types of simulations, but the result did not change; the ants found their way.

The last test involved the pedometer hypothesis. It surmised that ants could be counting their steps to determine how far they had traveled. To test whether they were doing so, researchers attached stilts made of hair strands to the legs of one group of ants after they found the food. As their legs now extended, they could move with longer scale steps. Another group of ants had their legs cut below the knee, thus shortened to increase the number of steps needed to walk the required distance back. They then observed the return journey of both groups of ants. The results were astounding; the ants with shorter legs had concluded their course before reaching the nest, while the ants with longer legs ended up passing the nest. Thus, it understood that the ants counted their steps according to the distance they traveled.

The findings reveal that the ants are created with an internal system that keeps track of the steps they take and re-calibrates itself on the way back. People make these complex calculations with measuring instruments and by knowing the laws of trigonometry. However, these small creatures find their way directly back without using any tools or computer applications. They do not use their perception to find direction, and they do not use any other directional methods because they all remember direction and distance as they move forward. If you look at this situation, what would be your simplest explanation? You can only have one definition: These little creatures can measure distances and angles precisely by applying mathematical calculations and trigonometry within their conditions. Since the first day of their existence, these creatures show only a few of the shreds of evidence of the divine power created them out of nothing with wondrous systems and superior abilities in their bodies.

I have put my trust in God, my Lord, and your Lord. No living creature is there, but He holds it by its forelock and keeps it under His complete control. Undoubtedly, my Lord is on a straight path (He governs all that exists and carries out His decrees rightly and with absolute justice). (Surah Hud, 56)

Termites are 1-2 cm in size, but they live in mud towers that can grow to five meters tall. The scale, between termite and tower, is comparable to that between a human and a skyscraper. When their life style, which seems chaotic from the outside, is investigated, one finds that termites maintain social lives within perfect urban communities. These wondrous mini cities feature air conditioning and ventilation systems, in addition to a queen chamber, and rooms for incubation and juveniles.

An instinctual sense of solidarity that has been ingrained among living organisms also plays an important role among termites. They display an amazing form of cooperation in matters like foraging and defense. As termites live in colonies, they follow a particular arrangement of duties. The queen is in charge of new generations; workers meet the nest’s needs, and soldiers are responsible for its defense. When necessary, workers also participate in defensive tasks. One of the termite’s defense mechanisms, which amazed scientists, was recently discovered in June 2012.

Jan Sobotnik, with the Academy of Sciences of the Czech Republic, and Thomas Bourguignon, of Université Libre de Bruxelles at French Guiana, discovered an unseen feature of the termite species Neocapritermes taracua. The workers of this species are, in a sense, enlisted to military duty when they “retire” due to old age and an inability to forage due to weakened mouths. They serve the defense of the nest as something of a chemical weapon specialist. When the colony is under attack, these veterans blow up a droplet-size balloon filled with a type of chemical generated in between segments of their neck and dorsal region.

When worker termites get older, blue crystal chambers, which resemble backpacks, grow on their two shoulder blades on their back. These crystals are a kind of protein called hemocyanin that contains copper, and they join together with saliva when under threat. This fusion causes a chemical reaction. The end product is a sticky liquid, like a gel, that is compressed to expand and then burst. This can fatally injure a predator. The poisonous substance that is dispersed causes rotting upon contact. The chemical formula of this blue crystal substance, along with its reactions, are still unknown.

Researchers from Oregon University (USA) reported that the mouth of an ant is worn down by age. When this occurs, these senior individuals, which used to cut leaves, now take on different jobs, like carrying the leaves. Leaf cutter ants, which are also known as the ranchers of the animal kingdom for their ability to cultivate fungi in their nests, can cut and carry leaves whose weight can be up to 50 times their body weight.

The leaves that are transported to the nest comprise the main ingredient required for the growth of fungi in a suitable environment regulated for the right temperature and humidity. This fungi is ultimately used to feed the colony. This is a fine example of senior members of a community staying active in a new role. And this is not just unique to termites: research shows that members of animal societies adapt to changes in their lives, and continue serving their colonies even if they lose some dexterity.

Our universe seems to be set up this way. As mentioned in the above examples, there is a change of occupation instead of just retirement. Just as there is no termite that stops working, there is no bird that says “I do not want to fly anymore because I am old,” or no tree that says, “I will retire and stop giving fruit because of my old age.” Organisms adapt to new conditions and find new ways to provide for our planet.

Our aging planet will continue rotating and the sun will keep smiling on us with its heat and light until the end of such organism’s lifetimes.

When it comes to humans, continuing with occupation and business as much as they can should be the desired effort. Especially for charity work, no one should mention retirement or leave of a duty, and receding to one’s quarters. Let us renew our intentions now, and review our senior living plans.

Termites, one of the most common insects in the ecosystem, have very interesting specifications and social behaviors. These insects are of interest due to their ability to digest cellulose and to recycle organic foods found in rotten leaves, dead wood or wood chips. Although they are considered by some to be harmful to the economy-in the USA alone 600 million dollars every year-because they eat wood, in truth they bring about more benefit than harm. As a result of the activities of these insects, our forests are able to respire and regenerate. Termites break down old, decayed, and fallen trees, digesting them and thus helping nature to renew with a continuous circulation of vital substances. Despite the depth of information that is known about the ecological and economical importance of termites, only a little is known about their biological structure and behavior. Two characteristic features of these insects are that they live in social colonies and that they are very susceptible to infections, as they build their nests in soil or rotten wood. Since their environment is covered with damp and warm earth, they are also surrounded by an abundance of bacteria.

How termites arrange their social lives and how they protect themselves against illness are two main subjects being investigated by biological scientists. When termites encounter fatal fungal infections, the termites that first become aware of the disease start to send warning signals to the other members of the colony. Even at the cost of their lives, these members will continue to send warning signals. That is, for the health and prosperity of the whole society, some individuals of the group will sacrifice their own lives. One of these signals consists of the contractions and vibrations sent by the termite that caught the disease. One type of termite that makes its nest in wood starts to eat and destroy its nest when it catches an infection. The vibrations and sound of this activity are received by the other members of the colony, and they quickly realize that they are faced with an emergency situation. They then spring into action to move their nest to a more secure place. These communication experts exhibit different movements and behavior in order to inform others of different kinds of dangers. They use different methods to warn others about the existence of an intruder, or a hole in the nest, or a disease they have caught. Consequently, the vibrations and oscillations caused by the movements of the termites constitute a kind of Morse code for termites. In other words, termites talk to each other through these oscillations and vibrations, which to us appear as no more than a strange puzzle for us.

J. Traniello from Boston University investigated the communication systems termites use to inform each other about disease-making microorganisms as his research subject (Mechanisms of Disease Response in Termites) . He made a rectangular shaped Perspex (clear acrylic) nest which he has divided into two sections. The material used for the divisions allowed the termites to pass from side to side. Moreover, some tubes were also placed around the nest so that the termites could leave the nest. He placed termites in both of the sections. After an adaptation period, one part of the nest was infected by spores of a fatal fungus called Metahizium anisopliae, with the change in the behavior of the insects being observed and recorded. Termites that sensed the infected parts of the section started to move their bodies up and down and back and forth, as if they were breathing deeply and continued to depict seismic waves like oscillations and vibrations. Termites in the clean part of the nest felt these vibrations and within an hour had completely abandoned the nest. An interesting observation in the experiment was that the termites in the infected part stayed in the nest and continued to vibrate. In order to determine that the termites left the nest only after receiving the vibrations sent by the termites that had detected the infection, sound absorbent foams were placed between the sections, and the same experiment was carried out three times more. In the experiments conducted with the absorbent foam, despite the existence of the disease, the termites in the uninfected sections did not leave the nest. This proves that termites were receiving the vibrations from the infected termites and were replying to them by immediately deserting the nest.

It was thought that the termites in the infected area would also leave the nest after sending messages to the termites in the other section. This hypothesis, however, proved to be false. They stayed where they were and continued sending warning signals until they died. This was another example of the sacrifice observed in social insects that give up their own lives for the continuation of their society. The termite perceives the existence of a fatal bacteria attack and immediately starts to send warning signals; and by not abandoning their nest, they successfully put into effect a quarantine system. These social insects, without any intelligence, apply the quarantine system in such a precise manner that the disease is completely prevented from spreading. What is more, by sacrificing themselves for their society, they show that the principle of “if a person’s endeavor is for his nation, that person becomes a miniature nation on his own” is not only valid for human beings.

Ants, using a different method than termites, synthesize bacteria eliminating chemicals in their saliva glands that protect them from infectious diseases. These chemical combinations are very effective against bacteria and fungi. Ants protect themselves by covering their bodies with these substances at certain intervals. Termites, although in appearance not very different from ants, do not produce antiseptic substances in their bodies. Termites use a different strategy by establishing a symbiotic relationship with the bacteria that live in their intestines. Some termites that feed on decayed wood need enzymes to digest the cellulose. The cellulose needed by termites is synthesized by the bacteria in their intestines and turned into sugar. Thus, termites receive the glucose they need for survival and bacteria are provided with a comfortable berth in the bodies of the termites. Because of this symbiotic relationship, the production of fatal antibiotics that would kill the bacteria would be harmful to the termites themselves.

Instead of producing chemical compounds or antibiotics like ants, the seismic movements and self-sacrificing behavior depicted by the termites has given scientists the idea that it may be possible to benefit from termites as an early warning system for earthquakes. This idea is reflected in the Holy Qur’an, chapter Naml (The Ant), verse 18:

Until, when they reached a valley of ants, one of the ants said: “O you ants! Get into your dwellings lest Solomon and his army crush you unawares.”

This verse shows us the sensitivity of ants to vibrations. They have organs in their feet that are sensitive to movement. For one of those ants to have been able to warn the other ants, it must either have seen or sensed the coming of Prophet Solomon’s army. As obviously an ant cannot see an army coming from a long distance, they must have felt the vibrations made by the feet of the soldiers. We know that sound waves move very fast and are strong in solid objects. Because of this, by placing an ear onto railway track one can hear the vibrations of a train from far away. Termites most likely have an organ that receives vibrations that is similar to that of ants, because if a species can produce a signal (e.g. light, sound, or vibrations) for communication, they must also have an organ that is capable of receiving this signal. Since termites communicate with vibrations, they must also have an organ that is sensitive to weak vibrations. From this respect, if the code that is based upon some of the behaviors and vibrations used by the termites can be decoded, then are techniques of predicting earthquakes can be considerably improved.

Ants and Ecosystem³

The abundance of ants on earth is legendary. They live almost everywhere except very cold places such as Antarctica and Greenland. A worker is less than one-millionth the size of a human being, yet ants taken collectively rival people as dominant organisms on the land. Lean against a tree almost anywhere and the first creature that crawls on you will probably be an ant. Stroll down a suburban sidewalk with your eyes fixed on the ground, counting the different kinds of animals you see. The ants will win hands down. The British entomologist⁴ C. B. Williams once calculated that the number of insects alive on earth at a given moment is one million trillion, 1018. If, to take a conservative figure, one percent of this host is ants, their total population is ten thousand trillion. Individual workers weigh on average between one to five milligrams, according to the species. When combined, all ants in the world taken together weigh about as much as all human beings. But being so finely divided into tiny individuals, this biomass⁵ saturates the terrestrial environment.⁶

Ants absolutely dominate in rainforests, which are the most biologically diverse ecosystems on earth. Rainforests are so diverse that in a single leguminous tree (a relative to beans and peas) in Peru, 43 species of ants belonging to 26 genera⁷ were found, about equal to the ant fauna⁸ of the British Isles. In a single square mile of tropical forest in Peru or Brazil, there may be 1,500 or more species of butterflies-twice the total number found in the United States and Canada combined.⁹ In Amazon rainforests ants and termites together compose nearly a third of the animal biomass. In other words, when all kinds of animals, large and small, from jaguars to monkeys down to roundworms and mites, are weighed, nearly a third of the weight consists of the flesh of ants and termites.

All of the ants, composing in formal taxonomic classification the family Formicidae of the order Hymenoptera, contain about 9,500 species known to science and at least twice that number of species remaining to be discovered, most of which are confined to the tropics. The total number of species of social insects is about 13,500 out of a grand total of 750,000 insect species that have been recognized to date by biologists. These numbers show that social insects seem to constitute 2 percent of all insects yet, in terms of biomass, social insects are half or more of all insects. Why are ants and other social insects so successful in the terrestrial environment? Their strength comes from their social organization.¹⁰ In addition to the question of why ants and other highly social insect species have been so successful, it is also important to understand how such a large collection of individuals maintains order and collectively accomplishes tasks without producing chaos. With potentially thousands of individual ants to coordinate, how do they make decisions regarding who does what and when, especially critical decisions regarding reproduction?¹¹ These questions become even more intriguing when you realize that ants have quite limited sensory devices to experience the world. They also have relatively simple nervous systems that process only a limited number of stimuli and are aware of only a few minutes to a few hours into the past.¹²

What is Collective Intelligence?¹³

Intelligence can be defined simply as the ability to solve problems. One system is more intelligent than another system if in a given time interval it can solve more problems, or find better solutions to the same problems. A group can then be said to exhibit collective intelligence if it can find more or better solutions than the whole of all solutions that would be found by its members working individually.

All organizations, whether they are firms, institutions or sporting teams, are created on the assumption that their members can do more together than they could do alone. Yet, most organizations have a hierarchical structure, with one individual at the top directing the activities of the other individuals at the levels below. Although no president, chief executive or general can oversee or control all the tasks performed by different individuals in a complex organization, one might still suspect that the intelligence of the organization is somehow merely a reflection or extension of the intelligence of its hierarchical head. This is no longer the case in small, closely interacting groups such as soccer or football teams, where the “captain” rarely gives orders to the other team members. The movements and tactics that emerge during a soccer match are not controlled by a single individual, but result from complex sequences of interactions. Still, they are simple enough for an individual to comprehend, and since soccer players are intrinsically intelligent individuals, it may appear that the team is not really more intelligent than its members.

With the growing interest in complex adaptive systems, artificial life, swarms, and simulated societies, the concept of “collective intelligence” is coming more and more to the fore. The basic idea is that a group of individuals (e.g. people, insects, robots etc.) can be smart in a way that none of its members is. Complex, apparently intelligent behavior may emerge from the synergy created by simple interactions between individuals that follow simple rules.

How do ants succeed?

Now we have lots of questions to ask about the success of ants as a group. How do they govern? Who is the ruler? How do they foresee the future? How do they elaborate plans and preserve equilibrium? These, indeed, are puzzling questions. Every single ant in a colony seems to have its own agenda, and yet an insect colony looks so organized. The seamless integration of all individual activities does not seem to require a supervisor. For example, leaf-cutter ants cut leaves from plants and trees to grow fungi. Workers forage for leaves hundreds of meters away from the nest, literally organizing highways to and from their foraging sites. Weaver ant workers form chains of their own bodies, allowing them to cross wide gaps and pull stiff leaf edges together to form a nest. Several chains can join to form a bigger one over which workers run back and forth. In their moving phase, army ants organize impressive hunting raids, involving up to 200,000 workers, during which they collect thousands of prey.¹⁴

A harvester ant colony performs many tasks: It must collect and distribute food, build a nest, and care for the eggs, larvae, and pupae. It lives in a changing world to which it must respond. When there is a windfall of food, more foragers are needed. When the nest is damaged, extra effort is required for quick repairs. Task allocation is the process that results in certain workers engaged in specific tasks, in numbers appropriate to the current situation. Task allocation is a solution to a dynamic problem and thus it is a process of continual adjustment. It operates without any central or hierarchical control to direct individual ants into particular tasks. Although “queen” is a term that reminds us of human political systems, the queen is not an authority figure. She lays eggs and is fed and cared for by the workers. She does not decide which worker does what. In a harvester ant colony, many feet of intricate tunnels and chambers and thousands of ants separate the queen, surrounded by interior workers, from the ants working outside the nest and using only the chambers near the surface. It would be physically impossible for the queen to direct every worker’s decision about which task to perform and when. Consider the commercially available ant farms being sold. Since it’s forbidden to transfer ant queens, in the US ant farms are sold with only worker ants. Still they work in harmony. They build their nest, they build bridges, they collect food and they defend their colony. They do all these things without a queen. The absence of central control may seem counterintuitive, because we are accustomed to hierarchically organized social groups in many aspects of human societies, including universities, businesses, governments, orchestras and armies. This mystery underlies the ancient and pervading fascination of social insect colonies.

No ant is able to assess the global needs of the colony, or to count how many workers are engaged in each task and decide how many should be allocated differently. The capacity of an individual is limited. It cannot make complicated assessments. It probably cannot remember anything for very long. Its behavior is based on what it perceives in its immediate environment. Each worker needs to make only fairly simple decisions. There is abundant evidence, throughout physics, the social sciences and biology that such simple behavior by individuals can lead to predictable patterns in the behavior of the group. It should be possible to explain task allocation in a similar way, as the consequence of simple decisions by individuals.

Though ant colonies must respond to changing conditions, the response does not have to be perfect. It is not like clockwork, or an army, each unit snapping into place so the whole system ticks on without a hitch. There must be enough ants to collect food, often enough for the colony to survive and grow. The appropriate range of numbers should be allocated over a set of similar occasions. If the colony did not get enough food today, perhaps it will tomorrow. The process results in more or less the right number of ants engaged in the appropriate task, often enough for the colony to carry on.

Maximizing the number of ants that perform each task may not always be best for the colony. A task allocation problem for a human city is how to get the right number of firefighters to the scene of a fire. It may be a waste to have too many firefighters on the city payroll. Too many ants allocated to each task may be expensive for a colony if the excess ants could be doing something more useful than waiting around when they are not needed.

The most difficult thing to grasp about task allocation is that it is not a deterministic process even at the individual level. An ant does not respond the same way every time to the same stimulus; nor do colonies. Some events influence the probabilities that certain ants will perform certain tasks, and this regularity leads to predictable tendencies rather than perfectly deterministic outcomes. The ant is jostled in a stream of events that send it sometimes into one task, sometimes another. Task allocation is not a system in which each ant awaits the crucial event that defines its status forever. Like a twig in a turbulent river, an ant may tend to go in one direction, but there are many places it could get washed ashore, to be picked up and then swept in another direction altogether.

Stories about totalitarian societies, inexorable armies, and voracious monsters are often told as stories about ants. But ants have no dictators, no generals and no evil masterminds. In fact, there are no leaders at all.

In short, the basic mystery about ant colonies is that there is no management. A functioning organization with no one in charge is so unlike the way humans operate as to be virtually inconceivable. There is no central control. No insect issues commands to another or instructs it to do things in a certain way. No individual is aware of what must be done to complete any colony task. Each ant scratches and prods its way through the tiny world of its immediate surroundings. Ants meet each other, separate, go about their business. Somehow these small events create a pattern that drives the coordinated behavior of colonies.¹⁵

Elements of Collective Intelligence¹⁶

More is different. This old slogan of complexity theory actually has two meanings that are relevant to our ant colonies. First, the statistical nature of ant interaction demands that there is a critical mass of ants for the colony to make intelligent assessments of its global state. Ten ants roaming across the desert floor will not be able to accurately judge the overall need for foragers or nest-builders, but two thousand will do the job admirably. Individual ants do not know that they are prioritizing pathways between different food sources when they lay down a pheromone¹⁷ gradient near a pile of nutritious seeds. In fact, if we only studied individual ants in isolation, we’d have no way of knowing that those chemical secretions were part of an overall effort to create a mass distribution line, carrying comparatively huge quantities of food back to the nest. It is only by observing the entire system at work that the global behavior becomes apparent.

Ignorance is usually useful for ants. The simplicity of the ant language-and the relative stupidity of the individual ants-is, as the computer programmers say, a feature but not a bug. Emergent systems can grow unwieldy when their component parts become excessively complicated. Better to build a densely interconnected system with simple elements, and let the more sophisticated behavior trickle up. That is why an ant does not respond to all stimuli around her, namely she ignores until she decides that the stimulus is strong enough to be responded to.

Encourage random encounters. Decentralized systems such as ant colonies rely heavily on the random interactions of ants exploring a given space without any predefined orders. Their encounters with other ants are individually arbitrary, but because there are so many individuals in the system, those encounters eventually allow individuals to gauge and alter the state of the colony itself. Without those haphazard encounters, the colony would not be capable of stumbling across new food sources or of adapting to new environmental conditions.

Look for patterns in the signs. While the ants do not need an extensive vocabulary and are capable of syntactical formulations, they do rely heavily on patterns in the semiochemicals they detect. A gradient in a pheromone trail leads them toward a food source, while encountering a high ratio of nest-builders to foragers encourages them to switch tasks. This knack for pattern detection allows meta-information to circulate through the colony mind: signs about signs. Smelling the pheromones of a single forager ant means little, but smelling the pheromones of fifty foragers imparts information about the global state of the colony.

Pay attention to your neighbors. This may well be the most important lesson that the ants have to give us, and the one with the most far-reaching consequences. You can restate it as “Local information can lead to global wisdom.” The primary mechanism of swarm logic is the interaction between neighboring ants in the field: ants stumbling across each other, or each other’s pheromone trails, while patrolling the area around the nest. Adding ants to the overall system will generate more interactions between neighbors and will consequently enable the colony to solve problems and regulate itself more effectively. Without neighboring ants stumbling across one another, colonies would be just a senseless assemblage of individual organisms-a swarm without logic.

Conclusion

Ants, first of all, have something to teach us about how nature works. Any system whose behavior arises from the interactions of its components has something in common with ant colonies. Using ants and other social insects as models, computer scientists have developed software agents that cooperate to solve complex problems, such as the rerouting of traffic in a busy telecom network or internet. Another example, the famous traveling salesman problem, in which a salesman tries to find the shortest and fastest route between many cities, is almost impossible to solve definitively. But with the methods inspired by ants the problem can be solved at least approximately, because ants are very good at finding the shortest path between the food and the nest collectively. Collective robotics borrowed from collective intelligence in ant colonies is being used to manage systems composed of lots of robots in synchronization.

Nature is a book to be read by the people who approach it to live in harmony, not to dominate. We are not the owners of the beautiful things around us, but observers searching for signs which reveal the wisdom behind them.

Footnotes

1. Haskins C.P., Of Ants and Men, Prentice-Hall Inc., 1939.
2. Huxley J., Ants, AMS Press, 1969.
3. An ecosystem is a grouping of plants, animals, and other organisms interacting with each other and with the environment in such a way as to perpetuate the grouping more or less indefinitely.
4. The scientific discipline in which ants are studied is called myrmecology and it is one of the branches of the study of insects, entomology.
5. Biomass is the total weight of all living organisms in a biological environment.
6. Holldobler B. and Wilson E.O., Journey to the Ants, Harvard University Press, 1994.
7. The word Genera is the plural of genus. Genus is a taxonomic category ranking below a family and above a species and generally consisting of a group of species exhibiting similar characteristics.
8. Fauna (Flora) is the animals (plants) of a particular region or period, considered as a group.
9. http://www.savenature.org/images/pdfs/ecoandinsects.pdf
10. Holldobler and Wilson, ibid.
11. Bonabeau E., Dorigo M., and Theraulaz G., Swarm Intelligence: From Natural to Artificial System, Santa Fe Institute Studies in the Sciences of Complexity, Oxford University Press, NY:1999.
12. Holldobler and Wilson, ibid.
13. Heylighen, F. “Collective Intelligence and its Implementation on the Web: Algorithms to Develop a Collective Mental Map,” Computational & Mathematical Organization Theory. 1999, Vol. 5, no. 3, pp. 253-280.
14. Bonabeau et al, ibid.
15. Gordon D., Ants at Work, W. W. Norton. 1999.
16. Johnson S., Emergence Simon & Schuster. 2001.
17. The pheromone is the semiotic chemical ants use to communicate with each other and with other colonies. Every colony has its own odor. That is why ants can recognize their sisters from the same colony easily.

Ants are highly social insects and have a complex system of internal communication. It is only by this system that the colonies manage to carry out their collaborative activities like nest- construction, food-gathering, brood-rearing, and defense of the colony. The fact that ants allow some alien species full access to the benefits of their society suggests that the guests must somehow have, in the words of Hölldobler, ‘broken the ant’s code, that is, attained the ability to ‘speak’ the ants’ language, which involves a diversity of visual, mechanical and chemical cues. ’

To support this suggestion, Hölldobler focused mainly on the rove beetle and looked into its communications and relations with certain species of ants. The relations vary considerably with the beetle species. Some live along the ants’ food gathering trail, some at the garbage dump, some in the chambers within the nest and others inside the brood chamber itself.

Atemeles pubicollis, a European species of beetle, is a well-known example of the species that live inside the brood chamber. It lives in the nest of the mound-making wood ant Formica polyetena during its larval stage. Hölldobler found that the ants’ adoption of the beetle larva depends on chemical communication. The larva secretes a substance that apparently acts as an attractant for the ant. The brood-keeping ants respond to the chemical signal with intense grooming of the larvae.

A different kind of communication takes place to elicit the ant’s feeding of the larvae. Hölldobler observed that the beetle larvae imitate certain begging behaviour of ant larvae involving mechanical stimulation of the brood- keeping adults. When the adult ant touches the beetle larva with its mouth or antenna, the larva rears up immediately and tries to make contact with the ant’s head. If the larva succeeds in tapping the ant’s lip with its own mouth, the ant regurgitates a droplet of food. The beetle larvae receive more food than the ant larvae since they perform the begging behaviour more intensely than the ant larvae do.

How does the ant colony manage to survive the beetle larvae’s competition for food? The answer is a simple:The beetle larvae are cannibalistic and unable to distinguish their fellow larvae from ant larvae by odour. Thus, they reduce their own population. That is why we find the ant larvae in clusters while the beetle larvae, having devoured their neighbours, are loners in the brood chamber.

The Atemeles beetles have two different homes with ants; one for the summer and one for winter. In the autumn, the beetles migrate to nests of the dark brown insect eating ants of the genus Myrmica. The reason for their migration is that brood-keeping and the food supply are maintained in Myrmica throughout the winter, whereas Formica ants suspend their raising of young. In the spring the beetles return to Formica nests for mating and the laying of eggs. The Lomechusa beetle are also co-dwellers with Formica ants. However, they do not change their environment for the winter. Instead, after hatching they simply move on to another Formica colony of the same species and share their food supply.

How the migrating beetle find its way to a Myrmica nest is another question. We find Formica nests normally in woodlands, whereas Myrmica are found in the grasslands beyond the woods. Hölldobler suggests that when the beetles leave the Formica nest, they generally move in the direction of increasing light. This may explain how the beetles manage to reach the relatively open grasslands where the Myrmica ants Jive. When they reach open grasslands they use the odour of the host species of ant to find a nest.

The beetle obtains recognition and adoption with a ritual, involving chemical communication, when it finds a Myrimica nest. The beetle first touches the ant lightly with its antenna and raises the tips of lts abdomen towards the host. The ant responds by secretions from glands on the tip of the abdomen. Next the ant is attracted to a series of glands along the sides of the beetle’s abdomen. Hölldobler calls these ‘the adoption glands’ because the ant will not welcome or adopt the beetle unless it senses their secretion. Most probably, the odour of this secretion mimics the odour of the ant can approach, and grasp it in order to carry it into the brood chamber.

The Atemeles care not the only species capable of making themselves at home with more than one kind of ant. Xenodusa beetles also change their nests with the seasons. The larvae live in Formica nests through the summer and live in the carpenter (Campotonus) ant nests in winter time. It is interesting that the carpenter ants also maintain larvae throughout the winter. Except for above mentioned beetles do not have the command of the ant language required to gain acceptance to the brood chamber. Some species of European beetles like Dinarda are limited to peripheral chambers of the nest of their host. Dinarda offers secretions from glands similar to Atemeles’ glands, but these secretions only induce the ant to tolerate the beetle, not to adopt it and take it into the brood chamber. Therefore Dinarda can only live on such food as it can find in the peripheral chambers. Other groups of beetles have communication sufficient only to allow the beetle to feed at the ants’ garbage dumps.

Many beetles closely resemble their ant hosts in appearance. This is particularly true of guests of the army ants. Some scientists concluded that the factor inducing the ants to accept the beetles as nest-mates was the beetles’ morphological resemblance to themselves. It was even thought to be case with Atemeles, although they do not particularly resemble their hosts. Hölldobler altered the shape ond the collar of these beetles artificially and found that morphological features do not contribute to the success of their relationship with their host. Instead it appears that communicative behaviour remains the essential requirement for acceptance. The guests’ mimicry of their hosts’ appearance, probably serves as a protection against predation by birds.

There are some questions still to be answered about ants and their hosts: How did the fascinating, effective system of communication between the beetles and their hosts develop?Why do only some species of beetles have this ability while the rest do not?

REFERENCES 

• ATKINS, M. D. (1980) Introduction la Insect Behaviour, Macmillan Publishing Co. Inc. , New York, pp. 100-2.
• HÖLLDOBLER, B. (1971) ‘Communication between Ants and their Hosts’, Scientific American, January, pp. 86-93.
• WIGGLESWORTH, V B. (1964) The Life of lnsects, The New American Library, New York

It was 1927. The warm days of spring had arrived in the beautiful village of Bark. The fine weather brought visitors from distant lands. One special guest would enjoy the long tranquil summer. She would nest in a high chimney near the mosque and wake to the voice of the muezzin calling the faithful to prayer and then recite her own long ballad. The sounds echoed through the hills. There was a longing sound in her voice. After mating and giving birth, the majestic visitor would normally have returned to her homeland to maybe come back the following year

The stork’s hopes were as long as her thin legs and protracted beak. She was young and beautiful and attracted the eye of a strong and handsome male. After their wedding, held in the deep blue sky, they flew away to build a new life together. The protective male proudly and jealously looked after her. She made her nest and began to lay her eggs one by one. The male counted them every day and protected them carefully. They anxiously awaited their chicks. But something happened. A mischievous hand interfered with the eggs. It was not a child. It was a cunning adult. He examined the eggs, and chose the best one. He stared at it and laughed through his rusty teeth. Holding his hat so as not to lose it to the wind, he climbed down from the tree, his evil prank completed.

He rushed to the coffee house and began to boast about what he had done. He had replaced the stork egg with a duck egg. With a cigarette in one hand and the egg in the other he bragged: ‘I took this egg and put a duck egg in the nest. Soon, we will see flying ducks’.

He returned home and showed off the egg to his children. They looked at it in astonishment. He put some butter in a pan and prepared to fry it. It sizzled as it struck the hot metal. At that very moment, the heart of the mother sizzled as she was struck by a burning desire to return to her nest. Like the man, they too returned to their nest to look after their young. Unaware of what had happened, the male sang his beautiful song and eased the worries of his mate.

Waiting for a new life is not easy. The male stork flew away early in the morning, and after searching near and far would return with all sorts of delicacies for his wife. When the chicks eventually hatched, cracking the shells one by one, she noticed that one was different. They were all cute and lovely, but one was different She looked at it again and again, but could not find any resemblance with the others. Her heart filled with compassion and took pity on it.

‘It grows up with the others,’ she said to herself. What was the difference apart from its short legs and beak? She could not throw it away. It would surely die and a soul would be lost. This poor chick would never survive. She dared not mention it to her proud and handsome mate.

As the chicks grew, the differences became more apparent. The male had not noticed at first and used to watch them all with great pride. Then, one day, he noticed the duckling. Everything changed. He frowned and became angry. He stared at his wife fluffing out his feathers. She understood what this meant and what he was thinking. She shrunk away and was unable to make a sound. She wanted to say ‘I pitied this chick and wanted to protect it.’ but she couldn’t.

The male stork fluttered his wings, rose, and came down on his wife violently this was an infidelity and an insult to himself and his generation. He could not bear it. He could not ignore it. He did not care that the others were not jealous. He was extremely jealous and very angry. Although he loved his wife a great deal, his jealousy turned to hate. A female is beautiful and beloved if she protects the honour of the male. As he struck her, his beak filled with her feathers. She would never leave the chick. She was a mother. She could never do such a thing. He struck her again, more violently this time. Her body bled. With the third blow she looked at her chicks, as if seeking help, but they could not understand what was happening.

He flew away to seek the views of the other storks. They decided. An unfaithful female has to be executed. She made no sound. She was at the mercy of the law. He got his revenge. They took her body to the village square and dropped it there as a kind of warning. The dead stork became a play thing for the children.

The man who had swapped the egg saw it. Now, he wasn’t laughing. A flame burnt inside. He felt a heaviness on his heart. It wouldn’t go away. He took to drink and couldn’t talk to his family. He was overcome by embarrassment at the way he boasted in the coffee house. The villagers became sad upon hearing the yelling of the chicks in the high chimney. No adult dared touch the corpse. The village felt sorry for its guest, but no one would remove her body

The cruel man could not leave his house. He pulled the curtains and took refuge in darkness. The pangs of conscience exhausted him. He could only go outside in the evenings. One night, with a bottle in his hand, he went to the village square. He was talking to himself. The beak of the stork stood upright like a knife. In his drunkard state he lost his balance and fell on it. The beak pierced his heart.