Peruvian Booby
Sula variegata
Common and conspicuous seabird of coastlines and inshore waters along the Humboldt Current. Sometimes in flocks of hundreds, diving steeply into the sea among feeding frenzies of cormorants, gulls, and terns. Also seen perched on jetties and cliffs; often with cormorants and pelicans. Adult is distinctive with a snow-white head and neck, and dark upperparts with white scaling on back. Juvenile is dingier overall with a dusky head and body. Compare with Blue-footed Booby (often occurs with Peruvian), which always has white body contrasting with dusky neck.
识别特征
The Peruvian booby has brown upperparts, and white underparts, as well as a white head. There is noticeable white mottling on the upper side of the wings. Their wing-coverts are tipped white, creating a scale-like pattern. They have a long, pointed, grey bill. Their feet are webbed and also grey; as opposed to the characteristic colouring of the blue-footed and red-footed boobiesFemale boobies tend to be larger than their male counterparts: their bodies an average of 19% heavier, and their wings 4% larger.
分类信息
The Peruvian booby is within the genus Sula. It shares this genus with other boobies, including the blue-footed booby, the red-footed booby, the brown booby, the masked booby, and the Nazca booby.<p>There are no subspecies of Peruvian booby, but some members of the species have been seen to hybridize with blue-footed boobies.
- 学名
- Sula variegata
- 命名信息
- (Tschudi, 1843)
- 目
- Suliformes
- 科
- Sulidae
- 属
- Sula
分布与栖息地
The Peruvian booby is confined to the waters of the Humboldt current, off the coast of South America. They can be found off the shores of Peru, south to the middle part of Chile. Their abundance on the islands of Lobos de Tierra and Lobos de Afuera have resulted in a great deal of research being done on the species from these locations.<p>Their colonies nest on smooth, windswept sand flats that allow their nests to stay between a temperature range of approximately 28 °C to 38 °C. These salt flats, or pampas, allow for a fairly high density of booby nests.
- 繁殖区
- SA : coastal n Peru to c Chile
- 非繁殖区
- to coastal Ecuador
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: stable.
- 种群趋势
- stable
照片
分布
鸟叫声
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