词条 | kestrel |
释义 | kestrel bird any of several small birds of prey of the genus Falco (family Falconidae (falcon)) known for their habit of hovering while hunting. Kestrels prey on large insects, birds, and small mammals. They exhibit sexual colour dimorphism, rare among hawks: the male is the more colourful. Kestrels are mainly Old World birds, but one species, the American kestrel (F. sparverius), called sparrow hawk in the United States, is common throughout the Americas. The American kestrel is about 30 cm (12 inches) long, white or yellowish below, reddish brown and slate gray above with colourful markings on the head. ![]() ![]() |
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