Brown Noddy
Anous stolidus
Dark-bodied tern of tropical offshore waters, rarely seen from mainland. Breeds in colonies on rocky and sandy offshore islets. Sometimes found with offshore feeding flocks of boobies and other terns. Feeds by picking from the surface, not plunge-diving like most terns. Adult solidly dark brown with white cap. White limited to the forehead on immature.
识别特征
The brown noddy is 38–45 cm (15–18 in) in length with a wingspan of 75–86 cm (30–34 in). The plumage is a dark chocolate-brown with a pale-grey or white crown and forehead. It has a narrow incomplete white eye-ring. The tail is long and wedge-shaped, and the feet and legs are dark.
分类信息
The first formal description of the brown noddy was by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae under the binomial name Sterna stolida. The genus Anous was introduced by the English naturalist James Francis Stephens in 1826. The genus name Anous is Ancient Greek for "stupid" or "foolish". The specific name stolidus is Latin and also means "stupid" or "foolish".<p>Four subspecies are recognised:
- 学名
- Anous stolidus
- 命名信息
- (Linnaeus, 1758)
- 目
- Charadriiformes
- 科
- Laridae
- 属
- Anous
分布与栖息地
- 迁徙
- Resident species
行为
The brown noddy is a colonial bird, usually nesting on cliffs, trees, or bushes. It occasionally lays its eggs on the bare ground. The nest itself is usually a platform nest, made of sticks and twigs.<p>In their nuptial displays, the female and male bow and nod to each other. Courtship feeding and flights accompany this, in addition to the transfer of a small, freshly caught fish from the male to the female.<p>This bird lays a clutch of one pink cream egg with lilac and chestnut maculation. The egg usually measures around 52 by 35 millimetres (2.0 by 1.4 in). This egg is incubated by both sexes for 33 to 36 days, with each parent incubating for one or two days while their mate is feeding at sea. After the chick hatches, it grows quickly; usually reaching the weight of the parents in three weeks. When it fledges, about six to seven weeks after hatching, it can sometimes weigh more than the parents, although this weight is lost quickly once it starts to fly. At this point, the fledgling is starting to rely on its parents less and less as it learns how to provide for itself.<p>The brown noddy forages by swooping over the water and dipping down to catch small squid, other molluscs, aquatic insects and fish (such as sardines, anchovies, etc.). It will also feed on fruit, mostly the screw pine fruit.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Smoky Bush-Tyrant
Myiotheretes fumigatus
Dark, medium-sized flycatcher of the Andes from Venezuela to Peru. Almost all chocolate-brown with slightly paler eyebrow and wingbars, and conspicuous cinnamon underwings in flight. Sexes similar. Compare with Streak-throated Bush-Tyrant, which has an orangish belly and streaked throat. Most often found singly in middle to upper levels of forest and edge from around 2,000–3,400 m. Sometimes perches conspicuously.
Buff-breasted Sabrewing
Campylopterus duidae
Large green and buff-colored hummingbird of the remote tepui highlands of southern Venezuela and extreme northern Brazil. Note the green upperparts, whitish spot behind the eye, and buff tail and underparts. Sexes similar. Common in tepui highlands, in bushes, forest edges, and open areas with small trees. Territorial, often alone or in pairs close to flowers. Voice is a nasal “dui” note repeated many times.
Chusquea Tapaculo
Scytalopus parkeri
Drab, mouse-like bird found in high-elevation cloud forest along the east slope of the Andes in southern Ecuador and far northern Peru. Plumage is gray with brown on lower back, wings, vent, and tail. If seen well, it may show faint barring on rump and vent. Similar to several other tapaculos, and best identified by range, elevation, and voice. Stays near the ground in the forest understory, and favors areas with stands of bamboo. Usual song is a very fast series of tripled notes.
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