Bank Cormorant
Phalacrocorax neglectus
A medium-to-large-sized, stocky, marine cormorant that is a specialist in kelp forests of the Benguela Current, where it is scarce resident. Similar to Cape Cormorant but slightly larger and thicker-necked. Adults have a black (not orange) throat patch and honey-brown (not blue) eyes, giving them a plain-looking face. If seen well, the head is flattish with an indistinct crest that more often manifests as a bulbous forehead. In flight, it is difficult to tell from the abundant Cape Cormorant unless the characteristic white back--most prevalent in the breeding season (but absent in some individuals)--is seen. Immatures are duller but retain the adult’s characteristic shape. Best seen at roosts.
识别特征
The bank cormorant is a heavy-bodied bird, roughly 75 cm in length. It is generally black in appearance with a bronze sheen, though the wings are a dark brown rather than a true black. Adults have a small crest on their heads, and normally have a white rump. Pale eyes in an all black face are considered to be distinctive for adults, with immature birds having dark eyes.
分类信息
Genus: Phalacrocorax; Family: Phalacrocoracidae; Order: Suliformes.
- 学名
- Phalacrocorax neglectus
- 命名信息
- (Wahlberg, 1855)
- 目
- Suliformes
- 科
- Phalacrocoracidae
- 属
- Phalacrocorax
分布与栖息地
- 迁徙
- Resident species
行为
A prime food for these birds is the cape rock lobster Jasus lalandii, and their feeding distribution closely matches the kelp beds where these lobsters live, though the birds will also take a variety of other crustacean and fish prey, notably bearded goby Sufflogobius bibarbatus.<p>The birds may breed at any time of the year, laying two or three chalky-white eggs in a nest constructed from seaweed and guano.
保护状况
Numbers of these birds have been declining sharply in recent decades, partly because of commercial fishing for bearded goby, partly because of increasing human disturbance, and partly because numbers of kelp gulls have been increasing because of human provisioning, and the gulls are active predators on the cormorant eggs and chicks. The world population is probably now around 4,000 birds. The most important population centres are in Mercury Island and Ichaboe Island in Namibia.
- 种群趋势
- declining
照片
分布
其他鸟类
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Augastes scutatus
Medium-sized, astonishingly beautiful hummingbird with a short straight bill. Males are green above and blue below with a bold white breast band. Females have a mottled gray-and-blue-green belly and a grayish face. Inhabits montane areas with rocky areas and shrubby vegetation (known as campo rupestre) only on the Serra do Espinhaço.
Nicobar Hooded Pitta
Pitta abbotti
Endemic to Great and Little Nicobar Islands, where it inhabits lush forests. A jewel of a bird, with an emerald-green body, black head, scarlet lower belly, and chestnut crown. Like other pittas, forages on the forest floor, where it can be difficult to see. Listen for its song, a series of three to four barking notes. Formerly grouped together with several other closely related species as “Hooded Pitta.”
White's Thrush
Zoothera aurea
Burly thrush with brownish upperparts and white underparts; covered with black-edged scaling all over the body. In flight, two bright white stripes visible on black underwings. Feeds solitarily on the ground, usually in or near dense cover; walks instead of hops, moving in a comically jerky manner. Often very approachable. Prefers mid- to high-elevation forests for breeding but regularly found in lowland parks and forests in winter. Compare Scaly Thrush. Song is a high, fluty whistle which fades in and out in a distinctly unbird-like manner.
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