Green Pygmy-Goose
Nettapus pulchellus
Tiny duck. Male has dark green head and neck with a white cheek-flash. Female lacks the dark head and neck, but has a strong dark eye-line continuing back to nape. Usually found in tropical freshwater wetlands across northern Australia.
识别特征
Ranging from 30 to 36 cm (12 to 14 in) in length, the green pygmy goose is one of the smallest species of duck. It has a 48 to 60 cm (19 to 23.5 in) wingspan. It has a small bill and a compact form. The breeding male has a predominantly dark green back and neck, and a dark gray crown. The cheeks are white, and the underparts are pale grey and white scalloped. The tail, primary flight feathers and primary coverts are black, while the secondary flight feathers are white. The secondary coverts are a dark iridescent green. This iridescence is lost outside of the breeding season and the plumage becomes duller. The species exhibits a degree of sexual dimorphism — the female has a barred rather than green neck but otherwise resembles the non-breeding male. Immature birds are less brightly coloured, and have mottled dark brown heads.<p>The male has a high-pitched whistle and the female a lower-pitched call.
分类信息
First described in 1842 by the ornithologist John Gould, its specific name is derived from diminutive of the Latin adjective pulcher "pretty". It is one of three species in the Afro-Asian genus Nettapus, an ancient and unusual group of ducks. No subspecies are recognised.
- 学名
- Nettapus pulchellus
- 命名信息
- Gould, 1842
- 目
- Anseriformes
- 科
- Anatidae
- 属
- Nettapus
分布与栖息地
The green pygmy goose is found in southern New Guinea and across northern Australia (from Western Australia, through Northern Territory and into Queensland). To the west, it commonly reaches Timor-Leste, where it possibly breeds at Lake Iralalara. It is largely resident, apart from dispersion in the wet season. The habitat is well-vegetated lowland lagoons and other permanent fresh waters.
- 迁徙
- Resident species
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Black-headed Honeyeater
Melithreptus affinis
Small honeyeater with entirely black head. Upperparts olive with white underparts. Black coloration on head cuts off sharply to white underparts. Juveniles lack black head—instead have black around eye and brown head. Endemic to Tasmania and primarily inhabits drier forests of lower altitudes.
Lesser Nighthawk
Chordeiles acutipennis
Long-winged nocturnal bird which catches insects in flight often around dawn and dusk. Found in shrubby open areas. Intricate brown, buffy, and gray patterning with white patches near wingtips. Very similar to Common Nighthawk, best distinguished by the position of white wing patch: closer to wingtip on Lesser, closer to base of wing on Common, but this difference can be very difficult to judge. Also typically paler than Common with more golden buffy tones. During the day, roosts on the ground or on a tree branch.
Antioquia Bristle-Tyrant
Pogonotriccus lanyoni
Rare flycatcher known only from a few sites in the Colombian Andes, mainly in the northern part of the central range. It is fairly small and mostly yellow, with a gray crown and broad, yellow wingbars. Yellow and gray smudges on ears can be very indistinct. Often confused with the much more common Yellow-olive Flycatcher, but bill is narrower, wingbars are brighter yellow, and voice is different. Typical song is a short burst that starts off as a dry rattle and then morphs into airy squeaking. Inhabits humid forest and sometimes joins mixed species flocks.
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