| 词条 | Guanay cormorant |
| 释义 |
| image = Leucocarbo bougainvillii qtl2.jpg | image_upright = 1.2 | status = NT | status_system = IUCN3.1 | status_ref = [1] | genus = Leucocarbo | species = bougainvillii | authority = (Lesson, 1837) | range_map = Guanay cormorant distribution map.svg | range_map_upright = 1.2 | range_map_caption = Distribution map of the Guanay cormorant | synonyms = Phalacrocorax bougainvillii Phalacrocorax bougainvilliorum }} The Guanay cormorant or Guanay shag (Leucocarbo bougainvillii) is a member of the cormorant family found on the Pacific coast of Peru and northern Chile. (The Argentinian population on the Patagonian Atlantic coast appears to be extirpated.) After breeding it spreads south to southern parts of Chile and north to Ecuador, and has also been recorded as far north as Panama and Colombia – probably a result of mass dispersal due to food shortage in El Niño years. Its major habitats include shallow seawater and rocky shores. The Guanay cormorant is similar in coloration to the rock cormorant, Phalacrocorax magellanicus, but larger, measuring 78 cm from the tip of the bill to the end of the tail. Its bill is grayish with some red at the base. The face is red with a green eye-ring. It has roseate feet. The head, neck and back are black as are the outer parts of the thighs. The throat patch, breast and belly are white. In breeding plumage it has a few white feathers on the sides of the head and neck. Breeding occurs year-round with a peak in November and December. The nest is built of guano on flat surfaces on offshore islands or remote headlands. There are up to three nests per square meter in high-density colonies. The Guanay cormorant lays two or three eggs of approximately 63 x 40 mm in size. It feeds mainly on the Peruvian anchoveta, Engraulis ringens, and the Peruvian silverside, Odontesthes regia, which thrive in the cold Humboldt Current. The Guanay cormorant is the main producer of guano.{{citation needed|date=June 2014}} Habitat loss and degradation and over-fishing have resulted in a steady decline of the population of about 30% from an estimated figure of 3 million birds in 1984. This species is listed as Near Threatened by IUCN. Some taxonomic authorities, including the International Ornithologists' Union, place this species in the genus Leucocarbo. Others place it in the genus Phalacrocorax. The scientific name commemorates the French explorer Louis Antoine de Bougainville. The bird's droppings were such an important source of fertilizer to the peoples of the Andes that it was protected by Inca rulers, who supposedly made disturbing the cormorants in any way punishable by death. References1. ^{{IUCN|id=22696810 |title=Phalacrocorax bougainvillii |assessor=BirdLife International |assessor-link=BirdLife International |version=2013.2 |year=2012 |accessdate=26 November 2013}} {{Commons category|Phalacrocorax bougainvillii}}
7 : Leucocarbo|Birds of Chile|Birds of Peru|Birds of Ecuador|Birds of Patagonia|Western South American coastal birds|Birds described in 1837 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。