Add Yahoo as a preferred source to see more of our stories on Google. Hummingbirds have one of the highest metabolic rates of any vertebrate. They are the only birds capable of sustained backward ...

Everyone loves to watch hummingbirds—tiny, brightly colored blurs that dart about, hovering at flowers and pugnaciously defending their ownership of a feeder. But to the scientists who study them, ...

Rainbow Hummer in Flight - Photograph of a Ruby Throated Hummingbird in flight silhouetted against a setting sun and golden sky. Sunlight shows iridescent colors in the feathers.© Ramona ...