Birds that feed on nectar or fruit evolved better mechanisms for managing metabolism, blood pressure and high glucose.

Anyone who has seen a hummingbird poking her beak deep into a trumpet creeper blossom, or a honeyeater using its brush-tipped ...

Irruptions happen when young snowy owls, pushed out by older, dominant birds in the Arctic, travel farther south in search of space during their first winter. These movements are closely linked to ...