Trophallaxis is the the transfer of food, nutrients, and other secretions by mouth-to-mouth or mouth-to-anus feedings within a community. This behavior can be found in colonies of insects such as bees, ants and termites, and it some species, is a form of communication as well as nutrition. It is also the method by which gray wolves, vampire bats, and many species of birds feed their young.
etymology: Coined in 1918 by entomologist William Morton Wheeler. Troph- + Greek állaxis "exchange"