White-headed Steamer-Duck
Tachyeres leucocephalus
Large, flightless sea duck of the coast of Chubut and Santa Cruz provinces of SE Argentina. From Flying Steamer Duck by White-headed’s pale head, large size, and massive bill. Spends most of time near shore foraging for molluscs and crustaceans by diving. Often in small groups, sometimes mixed with smaller Flying Steamer-Duck.
识别特征
Adult male Chubut steamer ducks have white heads with a bright yellow/orange bill with a black nail. Their webs and feet are yellow/orange with black claws. The rest of their plumage includes mostly grey bodies and white bellies. While the male is molting his bill turns to a duller yellow/orange.<p>Adult female Chubut steamer ducks have brown heads and necks with small white line going from the back of the eye to the fore-neck. Their bills have a greenish/yellow color.<p>The Adult female Chubut steamer duck looks very similar to the juvenile.
分类信息
- 学名
- Tachyeres leucocephalus
- 命名信息
- Humphrey & Thompson, 1981
- 目
- Anseriformes
- 科
- Anatidae
- 属
- Tachyeres
分布与栖息地
The Chubut steamer duck was originally thought to only be found strictly in the southern coast of the Chubut province in Argentina. However it is now known to have a larger range from the southern portion of the San Matías Gulf to Islote Chato. The crucial populations for this species are found in Bahía San Gregorio (Argentina) [1], Bahía Melo [2], and Caleta Malaspina[3]. These three crucial populations are all located in the San Jorge Gulf.
- 迁徙
- Resident species
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Streak-chested Antpitta
Hylopezus perspicillatus
A plump ball on sticks. Fairly common and easily heard, but shy and rarely seen in the open. Striking plumage: bold buffy eyering, gray crown, black mustache stripe, thick black and white streaking on underparts, and buffy spots on wings. Singles or pairs are found on or near the ground in mature lowland forest from Honduras to Ecuador. Occasionally perches higher when singing. Listen for its song, a short series of plaintive whistled notes.
Spanish Sparrow
Passer hispaniolensis
Similar in size and shape to House Sparrow. Breeding season males have a heavily streaked black breast and back and a rufous crown and nape. Males are duller in the nonbreeding season. Females are very difficult to separate from female House Sparrows but tend to have bigger bills and paler bellies. Colonial, builds huge stick nests, often in/under White Stork nests.
Spectacled Petrel
Procellaria conspicillata
Large, stocky, dark petrel. Look for the diagnostic pattern of white “spectacles” on the face. In flight, alternates slow wing beats with glides. Usually seen well offshore in relatively warm waters. Breeds only on Inaccessible Island. The closely-related White-chinned Petrel lacks the white face pattern.
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在户外识别鸟类，并在下一次观察时随手查阅鸟类图鉴。