For a migratory bird, good timing is a matter of life or death. Every spring countless warblers, geese, hummingbirds, and more—one in five bird species, all told—leave their winter hideaway on a long ...

Snow Petrels (Pagodroma nivea), Larsen B Ice Shelf, Weddell Sea, Antarctica. Photo: Sergio Pitamitz / VWPics (AP) December and January represent breeding season for seabirds in Antarctica, a time when ...

Before the mass-breeding programs of the early 20th century, turkeys took roughly 28 weeks to get to their full size, growing at an estimated rate of about 0.75 to 1 pound per week, according to one ...