The question of whether the chicken or the egg came first is probably one of the world's longest-running arguments. And while scientists cracked the question in 2010, saying the chicken must have ...

It has been an evolutionary puzzle which has long baffled scientists - why have penises simply vanished from the vast majority of birds? While ducks and geese are known for having extra-long penises, ...

Learn more about the earliest evidence of birds breeding and nesting in the Arctic, a behavior that millions of birds continue to this day. For a few months of the year, the Alaskan Arctic becomes ...

Q. Why do mockingbirds mimic the songs of other birds? Are there any other bird mimics? Can birds reproduce the sounds of other animals? A. Mimicry is a common trait of the northern mockingbird, which ...