Gulls off the coast of Argentina have developed a peculiar food habit: pecking at whales' back fat. The birds used to feed on skin shed by the whales, but they figured out how to go straight to the ...

Baby birds come in two styles: precocial or altricial. Precocial chicks, such as ducks, geese, sandpipers and turkeys, hatch from large, well-endowed eggs after long incubations. They can see, run, ...