| 词条 | Watercock | ||
| 释义 |
| name = Watercock | image =Gallicrex cinerea -Basai Wetlands, near Gurgaon, Haryana, India-8.jpg | image_caption=Male at Basai Wetlands, near Gurgaon, Haryana, India | status = LC | status_system = IUCN3.1 | status_ref = [1] | regnum = Animalia | phylum = Chordata | classis = Aves | ordo = Gruiformes | familia = Rallidae | genus = Gallicrex | genus_authority = Blyth, 1852 | species = G. cinerea | binomial = Gallicrex cinerea | binomial_authority = (Gmelin, 1789) }} The watercock (Gallicrex cinerea) is a waterbird in the rail and crake family, Rallidae. It is the only member of the genus Gallicrex. Traditionally held to be closely related to moorhens (which the adult male visually closely resembles), it is actually member of a mostly tropical Asian clade containing also Aenigmatolimnas, Amaurornis, Himantornis and Megacrex.[2] Their breeding habitat is swamps across south Asia from India, Pakistan, and Sri Lanka to south China, Korea, Japan, Philippines and Indonesia. They nest in a dry location on the ground in marsh vegetation, laying 3-6 eggs. These large rails are mainly permanent residents throughout their range. The body of this rail is flattened laterally to allow easier passage through the reeds or undergrowth. It has long toes and a short tail. Adult male watercocks are {{convert|43|cm|in|abbr=on}} long and weigh {{convert|476|-|650|g|lb|abbr=on}}.[3] They have mainly black-grey plumage with red legs, bill, extended frontal shield and horn. Young males are buff in colour, darkening as they mature. Their bill is yellow and their legs are green. Female birds are smaller at {{convert|36|cm|in|abbr=on}} and {{convert|298|-|434|g|oz|abbr=on}}.[3] They are dark brown above and paler below. the plumage is streaked and barred with darker markings. The bill is yellow and the legs are green. The downy chicks are black, as with all rails. These birds probe with their bill in mud or shallow water, also picking up food by sight. They mainly eat insects and small fish and seeds. They forage on the ground. Watercock are quite secretive, but are sometimes seen out in the open. They are noisy birds, especially at dawn and dusk, with a loud, gulping call. GalleryReferences1. ^{{IUCN|id=22692789 |title=Gallicrex cinerea |assessor=BirdLife International |assessor-link=BirdLife International |version=2013.2 |year=2012 |accessdate=26 November 2013}} 2. ^Garcia-R et al. (2014): "Deep global evolutionary radiation in birds: Diversification and trait evolution in the cosmopolitan bird family Rallidae" 3. ^1 CRC Handbook of Avian Body Masses by John B. Dunning Jr. (Editor). CRC Press (1992), {{ISBN|978-0-8493-4258-5}}.
5 : Rallidae|Birds of East Asia|Birds of South Asia|Birds of Southeast Asia|Birds described in 1789 |
||
| 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。