Great-winged Petrel
Pterodroma macroptera
A medium-sized, bulky dark petrel with a large head and long pointed wings. It often shows a grizzled, gray scaly muzzle around the bill. It flies fast with a flexed wrist and its heavy head angled downward, giving it a characteristic appearance. It breeds on subantarctic islands between the Tristan group and western Australia, dispersing across the southern oceans between 30 and 50°S, where it is a deep ocean specialist. Several species are similar to Great-winged Petrel. Gray-faced Petrel, sometimes considered the same species, breeds off New Zealand and is almost identical except for a more extensive grizzled face patch. The smaller Kerguelen Petrel has a more contrasting silvery underwing. The gadfly petrels mostly have more pale patterning on the underwing or belly and lack the bulkiness of Great-winged Petrel.
识别特征
This is a large seabird, with a body length of 42–45 cm. The bird is completely dark brown except for a variable patch of white near the base of the bill, which is black.<p>It is separated from sooty shearwater and short-tailed shearwater by the all-dark underwing, the thick, stubby bill, and different jizz. The similar flesh-footed shearwater has a light, pinkish bill. Petrels in the genus Procellaria are larger and have a less bounding flight.[citation needed]
分类信息
This species was formerly treated as containing two subspecies - P. m. macroptera and P. m. gouldi, the latter of which is endemic to New Zealand. As of 2014, the latter is recognized as a species in its own right, the grey-faced petrel (Pterodroma gouldi). In 2016 further research was published supporting the full species status of the grey-faced petrel.
- 学名
- Pterodroma macroptera
- 命名信息
- (Smith, A, 1840)
- 目
- Procellariiformes
- 科
- Procellariidae
- 属
- Pterodroma
分布与栖息地
The great-winged petrel breeds in the Southern Hemisphere between 30 and 50 degrees south with colonies on Tristan da Cunha, Gough Island, the Crozet Islands, the Prince Edward Islands, the Kerguelen Islands and on the coasts of southern Australia. It is a rare vagrant to the Pacific Ocean off the coast of California, United States.
- 繁殖区
- SO : subtropical to temperate is. from Tristan da Cunha and Gough (sc Atlantic Ocean) to Kerguelen Is. (se Indian Ocean) and islets off sw Australia
- 非繁殖区
- subtropical to temperate South Atlantic and South Indian oceans to s African and w Australian waters
- 迁徙
- Complete migrants
行为
The species feeds mostly on squid and to a lesser degree on fish and crustaceans. Prey is generally caught at night, by dipping and surface-seizing. The great-winged petrel will on occasion follow whales and associate with other related bird species to feed. Breeding occurs in the southern winter (beginning in April); nests are either solitary or in small colonies, located in burrows or aboveground among boulders or low vegetation.
保护状况
- 种群趋势
- declining
照片
分布
其他鸟类
Charming Hummingbird
Polyerata decora
Nearly identical to Blue-chested Hummingbird but no range overlap. Male has glittering purple-blue throat, green back and crown, paler grayish belly, and dark tail. Female less obvious, with spotted chest; note the pink base to the lower mandible of the bill. She is smaller than most other female hummingbirds that have spotted chests, such as White-necked Jacobin. Usually seen fairly low at a forest edge or shrubby second growth.
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.”
Rufous-throated Dipper
Cinclus schulzii
Dipper endemic to fast-moving streams in semi-humid montane forest with alders in Southern Bolivia and Northeast Argentina. The only dipper in its range. Rare, but fairly conspicuous where it occurs. Often in pairs or family groups, foraging in briskly moving streams for aquatic arthropods.
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