The honeybee dance language
A honeybee worker who has found a rich food source, when she returns to her colony, will perform a "dance" which contains information about the distance and direction to the food source.
Articles pertaining to the dance language from the UCR bee lab. Those with links are available here in pdf format.
A general review article about the dance language
Technical articles about the dance language and its use by honeybees
T. D. Seeley and P. K. Visscher 2003. Choosing a home: how the scout bees in a honey bee swarm perceive the completion of their group decision making. Behavioral Ecology and Sociobiology 54(5):511-520.