tinny pit call and twitters distinct from Anna’s. Costa’s generally plainer on throat and underparts, without dusky throat spotting. See black-chinned hummingbird.

The film "Hummingbird" explores the fascinating world of hummingbirds, detailing their various species, unique flight mechanics, and vibrant plumage. It follows the life cycle of the Calypte Anna ...

Though the springtime is often considered the best time of year to put out your hummingbird feeder, Anna's hummingbirds (Calypte anna) is a persistent visitor which, in recent years, has ...

Engineers at Stanford University in California found that Anna's Hummingbird (pictured) is more efficient than the best micro helicopter Think the ratio of the bird's wings make it so efficient ...

An Anna's Hummingbird sipping from a California Fuchsia. A new study suggests that hummingbirds are accustomed to ingesting small amounts of alcohol from natural sources, such as nectar.

While some hummingbirds are residents of California all year, others may only be seen for certain periods of time, if you're ...

This Anna’s hummingbird shakes off rain as a wet dog ... of aerodynamics to estimate the forces produced by freely flying animals. Dakin is trying to figure out how the birds control their ...