Researchers calculated the flight ability of more than 80 ancient cicada species to analyze their evolution over time.

A newly identified wrist bone in two non-avian dinosaurs has challenged long-held assumptions about the evolution of flight.

Bird Evolution: Few subjects in evolutionary theory have posed such intriguing puzzles for so long as the origin of birds. Evidence of avian beginnings has been elusive in the fossil record ...

Scientists have uncovered a surprising piece of the puzzle in the evolution of flight: a tiny wrist bone in certain dinosaurs ...

What we do know is that bird evolution was complicated. Many characteristics of birds seem to have evolved multiple times in dinosaurs, across numerous families. One of the main traits of birds today, ...

The updated bird family tree delineating 93 million years of evolutionary relationships between 363 bird species. CREDIT: Jon Fjeldså (drawings) and Josefin Stiller.

Here’s everything you need to know about the animal classification of birds and evolution. Are birds reptiles? Yes and no: It depends on how you classify animals.

Scientists uncovered a 149-million-year-old bird fossil in southeastern China with unexpectedly modern traits they believe could rewrite the evolutionary history of birds. The recently discovered ...

The fossil skeleton of a newly discovered dinosaur species was found in a pose suggesting it slept like modern birds. This sleeping behavior may have been more common than expected among non-avian ...

An analysis of two theropod dinosaur fossils has shown that they had a type of carpal bone (pisiform) in their wrists—a bone ...