The team measured the wing and leg bones of 111 bat species and 149 bird species from around the world. Their dataset included X-rays of museum specimens and about a third of the new X-rays of bat ...

"We already knew from past genetic analysis that the two groups are becoming different species, so we wanted to ... Although it’s not uncommon for birds to communicate with each other by flapping ...

Cormorants comprise 40 species of aquatic birds and are another group of awesome types of beach birds. They are medium to ...

When vertebrates moved onto land, long ago, some of them eventually became airborne, way after the insects did. There are ...

Birds are vertebrate animals adapted for flight. Many can also run, jump, swim, and dive. Some, like penguins, have lost the ability to fly but retained their wings. Birds are found worldwide and ...

Prominent black crescent framing lower edge of auricular. On perched bird, wing patch shows only as a thin white line along the leading edge of the folded wing. Adult male: grayish or grayish ...