There’s no mistaking the dizzying display of a hummingbird’s wings as it zips around from flower to flower looking for nectar. But often, that same frantic action is used to chase other hummingbirds.

At first, I didn't know what I was seeing — a tiny blur at the edge of a bush in Seattle's Wedgwood neighborhood, from which emitted a dramatic, high-pitched scream. Then the scene became clear: Two ...

CU Boulder researcher analyzes 50 years of data to show the relationship between certain birds’ unorthodox behavior and their traits Hummingbirds are iconic, easily recognized by their plumage, ...