The sharp, elongated bills of green hermit hummingbirds aren’t just fine-tuned for feeding; they also allow males to joust ...

Bill shape affects how efficiently a hummingbird feeds and how it competes with other hummingbirds. Because of humans, they ...

Carlos Martinez del Rio, professor emeritus in the UW Department of Zoology and Physiology, was part of a study that investigated how hummingbirds use torpor, a sort of overnight hibernation, during ...