The loss of these birds will lead to the unraveling or to the complete collapse of entire ecosystems. An adult male yellow-bellied sunbird-asity (Neodrepanis hypoxantha) in Ranomafana National Park, ...

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 ...

Urbanization is rapidly transforming natural habitats and poses growing challenges for wildlife. One lesser-known consequence ...

Yes and no: It depends on how you classify animals. There are two main classification systems – the Linnaean system which groups organisms by characteristics and the phylogenetics system, which ...

A biologist recorded a Kauaʻi ʻōʻō song in 1986, a song from either the last or one of the last individuals of the species. Credit: John Gerrard Keulemans (PD-US) / Smithsonian Digital Collections / ...