A recording of an extremely rare half male, half female Green Honeycreeper (Chlorophanes spiza)...

The bright lights of big cities could be causing an evolutionary adaptation for smaller eyes in some birds, a new study indicates.

While ravens do not occur in China's capital Beijing today, a new study analyzing fossil bird bones from the UNESCO World Heritage Zhoukoudian "Peking Man" site demonstrates that ravens lived in western Beijing at the same time as some of its famous ancient human inhabitants.

A team of paleontologists from the University of Canterbury has discovered a remarkably intact fossil of one of the earliest ancestors of a group of birds now restricted to the tropics. Tropicbirds, now represented by only three living species, have a long fossil record spanning at least 62.5 million years, with the oldest...

Here’s how newfound “spicy” birds resist their potent neurotoxin