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rufous hummingbird
The Rufous hummingbird (''Selasphorus rufus'') is a small hummingbird, about long with a long, straight and slender bill. These birds are known for their extraordinary flight skills, flying during their migratory transits. It is one of seven species in the genus ''Selasphorus''.
==Description==
The adult male has a white breast, rufous face, flanks and tail and an iridescent orange-red throat patch or gorget. Some males have some green on back and/or crown. The female has green, white, some iridescent orange feathers in the center of the throat, and a dark tail with white tips and rufous base.
The female is slightly larger than the male. Females and the rare green-backed males are extremely difficult to differentiate from Allen's hummingbird. This is a typical-sized hummingbird, being a very small bird. It weighs , measures long and spans across the wings.
They feed on nectar from flowers using a long extendable tongue or catch insects on the wing. These birds require frequent feeding while active during the day and become () at night to conserve energy. Because of their small size, they are vulnerable to insect-eating birds and animals.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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