Pink-footed Shearwater
Ardenna creatopus
Large shearwater, often messy-looking with smudgy brown neck and underwings. Underparts are usually fairly clean white, but sometimes mottled brownish or rarely all-dark. Look for pink bill with dark tip; namesake pink feet are hard to see. Relatively slow, lazy wingbeats compared with other shearwaters, with high arcs in strong wind. Common and widespread in the eastern Pacific, from Alaska to Chile. Occasionally seen from land, but prefers to stay offshore. Often gathers in large flocks, freely mixing with other species of shearwater.
识别特征
The pink-footed shearwater (Ardenna creatopus) is a species of seabird. The bird is 48 cm (19 in) in length, with a 109 cm (43 in) wingspan. It is polymorphic, having both darker- and lighter-phase populations. Together with the equally light-billed flesh-footed shearwater, it forms the Hemipuffinus group, a superspecies that may or may not have an Atlantic relative in the great shearwater. These are large shearwaters which are among those that could be separated in the genus Ardenna. A molecular phylogenetic study published in 2021 found very little genetic difference between the pink-footed shearwater and the flesh-footed shearwater (Ardenna carneipes). The authors of the study suggested that these two taxa might be better considered as conspecific. This species is pelagic, occurring in the Pacific Ocean. It predominantly nests on offshore islands off Chile, i.e. Mocha Island. It is a transequatorial migrant, moving toward subarctic waters of the Pacific after raising its young. It is fairly common well off the West Coast of the United States during the country's warmer months. The pink-footed shearwater feeds on mainly fish, squid, and crustaceans. This bird nests in burrows, preferring forested slopes. It is a colonial nester. Numbers of this shearwater have been reduced due to predation by introduced species, such as rats and cats. Some loss of birds also occurs from becoming entangled in fishing gear. The pink-footed shearwater is one of the species to which the Agreement on the Conservation of Albatrosses and Petrels applies.
分类信息
Genus: Ardenna; Family: Procellariidae; Order: Procellariiformes.
- 学名
- Ardenna creatopus
- 命名信息
- (Coues, 1864)
- 目
- Procellariiformes
- 科
- Procellariidae
- 属
- Ardenna
分布与栖息地
Breeding range: PO : e South Pacific Ocean islands off Chile: Santa Clara and Morro Vinilla (sw of Robinson Crusoe), Robinson Crusoe (=Mas a Tierra; Juan Fernandez Is., far w of c Chile) and Isla Mocha (just w of sc Chile). Non-breeding range: inshore and coastal e Pacific Ocean waters to s Chile and n to Gulf of Alaska.
- 繁殖区
- PO : e South Pacific Ocean islands off Chile: Santa Clara and Morro Vinilla (sw of Robinson Crusoe), Robinson Crusoe (=Mas a Tierra; Juan Fernandez Is., far w of c Chile) and Isla Mocha (just w of sc Chile)
- 非繁殖区
- inshore and coastal e Pacific Ocean waters to s Chile and n to Gulf of Alaska
- 迁徙
- Complete migrants
行为
Migration pattern: Complete migrants.
保护状况
- 种群趋势
- unknown
照片
分布
鸟叫声
其他鸟类
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Psilopogon rubricapillus
Small, green barbet with a red forehead, light orange markings around the eye, blue sides to the face, and unstreaked belly. Usually located by incessant calls, given from the treetops. Occurs in open wooded areas, gardens, forest and forest edge in the lowlands and foothills, where typically encountered as singles or pairs. Most abundant in the wet zone, but occurs locally in the dry zone. Separated from Yellow-fronted Barbet by smaller size and red forehead, and from Coppersmith Barbet in lacking streaks below. Song is an incessant “pop-pop-pop-pop…”, while faster call notes are also given, “opopopopop”.
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Brightly-colored swallow with a deeply forked tail, pale orangish rump, black squared-off undertail coverts, and an incomplete orange collar. The underparts are always streaked, though there is geographical variation, with streaks ranging from fine and sparse to thick and heavy. Juveniles average paler and lack extensive orangish tones; may resemble house-martins but note deeply forked tail. Builds mud nests on mountains, cliffs, and on human structures. Forages over open areas. Frequently gives a short, sparrow-like “twi’wit.” Usually separated from European Red-rumped Swallow by range, but in case of any overlap, should be separated by evenly cinnamon rump (vs. bicolored), dark lores, dark stripe on nape, and bolder streaking on underparts.
Stripe-breasted Starthroat
Heliomaster squamosus
A large hummingbird found in forest and semiopen habitats such as savannas. Males have a green body bisected by a white stripe on the belly. Also note the dazzling metallic-pink gorget and blueish forehead on males. Females are grayish-green above and below with a white stripe down the center and a scaly-looking throat.
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