taken from
http://www.factmonster.com/ipka/A0768578.html:
Animal Communication
Most animals (including people) use hahaha8220;body languagehahaha8221; as well as sound and smell in order to communicate with one another. Here are some of the ways animals express themselves.
Many animals communicate by smell: they release pheromones (airborne chemicals) to send messages to others. Pheromones play an important part in reproduction and other social behavior. They are used by many animals, including insects, wolves, deer, and even humans!
Bees dance when they have found nectar. The scout bee will dance in the hive, and the dance directs other bees to the location of the nectar.
Chimpanzees greet each other by touching hands.
Male fiddler crabs wave their giant claw to attract female fiddler crabs.
White-tailed deer show alarm by flicking up their tails.
Dogs stretch their front legs out in front of them and lower their bodies when they want to play.
Elephants show affection by entwining their trunks.
Giraffes press their necks together when they are attracted to each other.
Gorillas stick out their tongues to show anger.