Imagine zooming out on a giant family tree that includes every bird you have ever seen. Ostriches sprint across open plains, hummingbirds hover at flowers, penguins slice through cold seas, and eagles ...

Birds are the most diverse land vertebrate on the planet, and now scientists have constructed a complete evolutionary tree of the 11,000 or so known species. This data came from hundreds of studies ...

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 ...

Evolution is the primary hypothesis, but the authors note there are other explanations that need to be ruled out, such as gene flow, when individuals from elsewhere, such as the mountain birds, enter ...

Add Yahoo as a preferred source to see more of our stories on Google. Most phylogenies exist in academic papers and remain difficult to interpret. Cornell’s Birds of the World Phylogeny Explorer puts ...

(CNN) — Dark-eyed junco songbirds have been serenading the University of California, Los Angeles campus for decades as they forage for food. The species from the sparrow family is not usually found in ...