Mongolian Gull
Larus mongolicus
A large gull that breeds mainly inland, and migrates to the coast for the winter. Adults have a fairly pale gray back, pale eye, and dull yellow legs that can have a hint of pink coloration. Takes four years for immatures to progress from mostly brown to fully white and gray adult plumage; intermediate plumages are often mottled and messy. Variable plumage can make identification tricky. Occurs inland and along the coast, frequenting river mouths, harbors, beaches, lakes, and ponds. Often forms flocks with other gulls. Very similar to Vega Gull, and separation often difficult, but has a smaller head and bill; adults also generally have yellower legs.
识别特征
A large gull that breeds mainly inland, and migrates to the coast for the winter. Adults have a fairly pale gray back, pale eye, and dull yellow legs that can have a hint of pink coloration. Takes four years for immatures to progress from mostly brown to fully white and gray adult plumage; intermediate plumages are often mottled and messy. Variable plumage can make identification tricky. Occurs inland and along the coast, frequenting river mouths, harbors, beaches, lakes, and ponds. Often forms flocks with other gulls. Very similar to Vega Gull, and separation often difficult, but has a smaller head and bill; adults also generally have yellower legs.
分类信息
- 学名
- Larus mongolicus
- 目
- Charadriiformes
- 科
- Laridae
- 属
- Larus
照片
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其他鸟类
Andaman Cuckooshrike
Coracina dobsoni
A stocky, medium-sized cuckooshrike with a heavy, dark bill. Similar to Large Cuckooshrike, but the Andaman Cuckooshrike is slightly smaller, slimmer, and darker gray on the upperparts; lacks white tail tips; and has strong barring all through the underparts. Inhabits dense forests, where it is uncommon and sticks to the high canopy.
Sao Tome Oriole
Oriolus crassirostris
Old World oriole that is unusual in nearly lacking yellow in its plumage. There is a dark hood which is solid in males and streaky in females. A small white mark on the wing and pale yellow marks in the outer tail can be conspicuous in flight. Found in the canopy of rainforest at low and middle elevations. Song is a series of slurred, low-pitched liquid whistles. Calls include a harsh, upslurred nasal scold. Easily identified, as it is the only oriole on the island of Sao Tome.
Dulit Frogmouth
Batrachostomus harterti
Large frogmouth of Borneo’s central mountains. Inhabits foothill forest (typically 600–1230 m). Heavyset, with a whiskered face and bright white spots on the wings. Similar Large Frogmouth is generally found at lower elevations; Dulit has broader (as opposed to Large’s sharply triangular) white wing spots, strong pale barring on the throat, and overall darker coloration. Song is a low, resonant, melancholy-sounding “hooooo’m”; call consists of barks, typically given in pairs: “woo’WUP!”.
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