Orinoco Goose
Oressochen jubatus
Small goose of seasonally flooded grasslands and rainforest rivers. Two-toned, with a brown body and cream-colored head, neck, and breast. The wings are dark iridescent green, with a small white patch visible in flight. Found along rivers and flooded grasslands, where it swims and walks along beaches, often in pairs. Rare or absent from some areas it was previously found due to hunting.
识别特征
The Orinoco goose is 61 to 76 cm (24 to 30 in) long. Males weigh about 1.8 kg (4.0 lb) and females about 1.3 kg (2.9 lb). Adult males have an off-white head, neck, and breast with slight buffy streaks on the nape and buffy scalloping on the breast. Their mantle is gray with white scalloping. They have an orange band across the upper mantle and onto the sides of the breast and flanks and a crescent of dark brown behind the flanks. Their undertail coverts are white. Their wings are black with a wide white speculum. Also, their bill has a black maxilla and a mostly red mandible and their legs and feet are bright salmon red. Adult females have a similar pattern as the males but have a drab wash on their crown and nape, less orange on the flanks, and darker scalloping on the sides of the belly. Their legs and feet are more a dull orange than bright red.
分类信息
The Orinoco goose's taxonomy is unsettled. The International Ornithological Committee (IOC) and BirdLife International's Handbook of the Birds of the World (HBW) place it alone in the genus Neochen. However, based on a molecular phylogenetic study published in 2014, the South American Classification Committee of the American Ornithological Society and the Clements taxonomy place it and the Andean goose in the resurrected genus Oressochen. The IOC and HBW place the Andean goose in the genus Chloephaga.<p>Two fossil relatives have been described from Pleistocene sites in South America, Neochen pugil and N. debilis.<p>The Orinoco goose is monotypic.
- 学名
- Oressochen jubatus
- 命名信息
- (Spix, 1825)
- 目
- Anseriformes
- 科
- Anatidae
- 属
- Oressochen
分布与栖息地
The Orinoco goose is found from Venezuela south through Colombia, eastern Ecuador, eastern Peru, and Bolivia into far northern Argentina and in a broad swath across central Brazil. An isolated population spans the northern Brazil–Guyana border. Though the IUCN range map includes French Guiana, Suriname, and Paraguay, the South American Classification Committee of the American Ornithological Society has no records in the first two countries and records only as a vagrant in Paraguay.<p>The Orinoco goose inhabits wet savanna and the edges of large freshwater wetlands in the wet season and in the dry season, it is also found on river beaches and oxbow lakes in the Amazon Basin.
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Boat-tailed Grackle
Quiscalus major
Large, lanky blackbird with rounded crown and long tail. Males have ridiculously long tails, almost as long as their body, often held in a V-shape like the keel of boat. Males are glossy black. Females are brown, with subtle face pattern. Eye color ranges from brown along western Gulf Coast to yellow on Atlantic Coast. Strictly coastal, except in Florida where they occur inland (often around human development). Overlaps with similar Great-tailed Grackle on Texas coast, but occurs more strictly in coastal saltmarshes and has dark eye (not pale).
Jamaican Oriole
Icterus leucopteryx
A fruit-loving inhabitant of woodlands and gardens. Adult is yellow (often tinged green or orange), sports a black beard, and has very large white wing patches covering half of the otherwise black wing. Immatures look similar, but they have two broad white wingbars instead of a white patch. Immature male Orchard Oriole looks somewhat similar, but it is smaller and lacks the bold white wing markings seen on Jamaican Orioles. Songs include a rapid series of rich, whistled, and mostly down-slurred phrases and “cheat-you, cheat-you, cheat-you, cheat-you, cheat.”
Black-and-white Tanager
Conothraupis speculigera
Highly distinctive and unusual species that is more reminiscent of a large seedeater. It has a unique migration pattern, breeding during the rainy season in the Tumbes eco-region in northwestern Peru and southwestern Ecuador and wintering in the western Amazon. The male is hard to mistake for any other species; notably larger than any similarly-patterned seedeater in range, with a longer, thinner bill. Females are dingy greenish overall, with a pale yellow belly faintly streaked with olive. Combination of size and shape, and association with males of this species should clinch the ID.
开始您的观鸟之旅
在户外识别鸟类，并在下一次观察时随手查阅鸟类图鉴。