Like many “western” hummingbirds, the broad-tailed is increasingly found ... variably washed cinnamon. Immature male: resembles adult female but upperparts fresher in fall, with fine buff ...

A research team led by Princeton's Mary Caswell Stoddard trained wild hummingbirds, like this male broad-tailed hummingbird, to perform a series of experiments that revealed that the tiny birds ...

Male Ruby-throated Hummingbird in flight ... The White-necked jacobin. The White-throated Mountain-gem. A female broad-tailed hummingbird.