YenR YenI YenS are involved in the control of swimming and swarming motility.

I'll show you a computer model made by Iain Couzin, a researcher at Oxford, that shows how swarms work.

At the finished nest, a pair gives displays similar to those of the group ceremonies and mates, often on top of the nest.

Supporters of factory farming often point out that bird flu can be spread by free range flocks, or by wild ducks and other migrating birds, who may join the free range birds to feed with them or drop their feces while flying overhead.