Friday, December 10, 2010

Wild Language—The Secrets of Animal Communication

WITHOUT a doubt, one of the most precious gifts humankind has been given is the power to communicate. With it we pass vital information to one another either verbally or by nonvocal methods, such as gestures. Freedom of speech is, in fact, a widely contested issue throughout the earth. Some have therefore assumed that communication is only the preserve of humans.
Yet, research shows that animals exchange information in intricate ways that often baffle humans. Yes, they “speak,” not with words, but through visual signals such as wagging tails, twitching ears, or flapping wings. Other forms of communication may involve the use of voice, such as a bark, a roar, a snarl, or the song of a bird. Some of the “languages” are obvious to humans, while others require much scientific study to detect.

Predators!
It is mid-July. In the sprawling Serengeti National Park in Tanzania, thousands upon thousands of wildebeests are heading northward toward the Masai Mara Game Reserve in Kenya in search of greener pastures. The plains resonate with the sound of hooves during this annual migration. However, dangers lurk along the way. The route is lined with predatory animals, such as lions, cheetahs, hyenas, and leopards. The wildebeests will also take their chances by crossing the crocodile-infested Mara River. How do wildebeests ward off predators? To confuse the enemy, the wildebeest, or gnu, will run fast over a short distance and then turn around to face the enemy, all the while tossing its head from side to side. It will throw its legs about in a freakish manner, creating a rather ludicrous show. Even a hardened predator will not fail to stop in amazement on seeing this erratic dance. Should the predator insist on approaching, the wildebeest will do a repeat performance. This so confuses the intruder that the hunt may be abandoned after the concert. Thus,the ungainly dance has earned the wildebeest the dubious distinction of being the clown of the plains.
The wildebeest’s smaller cousins, impalas, are known for their gigantic leaps. To many, these high jumps could signify gracefulness and speed. In times of trouble, though, this antelope uses its soaring techniques to make it difficult for a predator to trap it by the legs. The leaps, up to 30 feet [9 m] in length, give the attacker a clear message, “Follow if you can keep up with me.” Few animals of prey are willing to do so just to bring down the unwilling impala!

A Time to Eat
In the wild many predatory animals have to develop their hunting skills in order to become good hunters. Young ones must pay keen attention as their parents take them through the paces. In an African animal sanctuary, a cheetah named Saba was observed giving vital lessons of survival to her cubs. After stalking a grazing Thomson’s gazelle for over an hour, she made a giant leap forward and then trapped and choked the hapless antelope—but without killing it. Moments later, Saba dropped the dazed animal in front of her cubs, which were strangely reluctant to throw themselves at the prey. These young cheetahs understood why Mother had brought a live animal to them. She wanted them to learn how to kill the gazelle. Each time the prey tried to get up and run, the overexcited cubs brought it down. Exhausted, the gazelle gave up the fight for survival. Watching from a distance, Saba approved their actions.
Some animals specialize in making as much noise as possible while searching for food. A pack of spotted hyenas will grunt, snort, and giggle while running after prey. Once the kill is made, other hyenas will be invited to the feast by the hyenas’ infamous “laugh.” However, hyenas do not always hunt for food. In the wild they are among the worst of the food pirates—using all methods of harassing other predators to get their kill. Why, they have been known to scare away lions from their meal! How do they accomplish this? Boisterous animals, they will work themselves into a frenzy in a bid to disturb the feeding lions. Should the cats ignore the noise, the hyenas will become more excited and bolder. Their peace disrupted, the felines often abandon the carcass and move away from the area.
Among bees the search for food is a complicated ritual. Complex scientific studies have revealed that by dancing, a honeybee informs others in the hive of the location, type, and even quality of the food found. On its body a bee carries samples of the food, such as nectar or pollen, back to the other bees in the hive. Doing a figure-eight dance, it is able not only to direct others to the food source but also to indicate the distance to be covered. Watch out! That bee hovering around you might be collecting some vital information to take back home. Your scented perfume could be mistaken for its next meal!
Keeping in Touch
Few sounds are as spectacular as the roar of a lion during a quiet night. Several reasons have been advanced for this communication. A male’s mighty roar is a warning to all that he is in the territory; intrude at your own risk. However, being a social cat, the lion will also roar to keep in touch with other members of the pride. This is usually a softer, less assertive roar. During one night a lion was heard to roar every 15 minutes until a cousin answered from a distance. They kept “talking” for another 15 minutes until they finally met. The roars ceased.
Such contacts not only enhance good relationships but also offer protection against harsh weather elements. A hen will utter several vocalizations that convey different messages to her chicks. The most distinct, however, is the long, low purring sound made in the evening, indicating that she has come home to roost. Heeding Mother’s call, the scattered young ones gather under her wings and retire for the night..

Finding a Partner
Have you ever been stopped in your tracks by the melody of songbirds? Are you not fascinated by their ability to sing the notes? Yet, did you know that entertaining you is the least they intend to do? Their songs are methods of passing important messages. Although at times singing is a means of establishing territory, it is also used in a large way to attract potential mates. According to The New Book of Knowledge, “the amount of singing drops by 90 per cent” once the male and the female have found each other.Sometimes, however, it takes more than just a good song to win a partner. Some female birds require that a “bride-price” be paid before they are won over by a male. Thus, a male weaverbird will have to demonstrate his nest-building skills before making further moves. Other male species will prove their ability to provide by literally feeding the female.
No doubt,the intricate ways in which animals communicate not only serve their physical needs but also reduce fights and promote peace in the wild. With more research being done on animal communication, we have yet to hear the last of this “wild talk.” Although we may not comprehend it fully, it does make us to wonder on this question: were they designed?

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