The study found that bird species who nest in tree cavities have independently evolved heightened aggression across lineages, particularly in females. Scientists have long wondered whether evolution ...

Shapes of beaks and snouts come in an extraordinary range of forms, reflecting adaptations to different lifestyles and environments. Yet beneath this diversity lies a paradox: across birds and mammals ...

Birds may look remarkably familiar today, but their skeletons carry clues to a far more turbulent evolutionary history. A new study from researchers at the University of Michigan has used artificial ...

Researchers at Rice University have uncovered new insights into the evolution of bird behavior, revealing why certain mating systems persist while others disappear over time. "This research not only ...

Birds are the only dinosaur lineage that survived until today. About 66 million years ago at the Cretaceous–Paleogene (K–Pg) boundary, a mass extinction event destroyed all non-avian dinosaurs, ...

Many of today's paleontologists say birds are dinosaurs—specifically, the surviving members of a group called theropods. But is it true? Alan Feduccia, an ornithologist and evolutionary biologist at ...