Black-collared Swallow
Pygochelidon melanoleuca
Small, handsome swallow of boulder-strewn rivers. Black-and-white pattern is distinctive but can be surprisingly hard to discern in bright sunlight. Note long-tailed profile and habitat. When gliding, often appears to hold wings below the horizontal. Seldom if ever encountered away from rocky rapids, around which groups cluster, sitting directly on rocks and flying about, chasing insects. Tends not to fly higher than treetop level. Often found with the more widespread White-banded Swallow.
识别特征
As an adult, it is approximately 14 cm long, and weighes 10-12 grams.
分类信息
Genus: Pygochelidon; Family: Hirundinidae; Order: Passeriformes.
- 学名
- Pygochelidon melanoleuca
- 命名信息
- (Wied-Neuwied, M, 1820)
- 目
- Passeriformes
- 科
- Hirundinidae
- 属
- Pygochelidon
分布与栖息地
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: stable.
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类

Black-faced Antbird
Myrmoborus myotherinus
Short-tailed antbird of forest understory. Both sexes have black face. Males are gray with white wingbars; females are brown above, buffy below, with cream wingbars and a white or buffy throat. Forages singly or in pairs low in the undergrowth of mature forest. Usually inhabits more mature forest than similar White-browed Antbird, but there is some overlap. Note differences in facial pattern; males lack the white eyebrow and females lack the orange eyebrow seen on White-browed Antbirds. Female Black-faced Antbirds also have browner underparts than White-browed. Listen for an even-paced series of 5–7 whistles that is slightly higher in the middle. In the southern part of its range, these whistles are pure-toned; in the north, they are harsher.

Izu Thrush
Turdus celaenops
Handsome songbird found only on Izu, Tokara, and a few other islands off the coast of Japan, where fairly common, most abundant in broadleaf evergreen forests. Male orange-brown above, rich orange below, with black hood, yellow bill, and yellow eyering. Female lacks male’s hood and intense colors; very similar to female and young Brown-headed Thrush but has extensive black spotting on the undertail coverts. Song recalls Japanese Robin’s.

Common Tern
Sterna hirundo
Medium-sized tern found on open ocean, beaches, and large lakes. Adults have pale gray body and black cap. Bill color differs by subspecies: most have red bill with black tip, but some Asian birds have all-black bills. First-years show dark outer primaries, dark shoulder, and black restricted to back of neck. Similar to Forster's, Arctic, and Roseate Terns. Separated from breeding Forster's Tern by entirely gray upperwings; nonbreeding Forster's shows black ear patch. Somewhat longer-billed and shorter-tailed than Arctic Tern, with paler body. Shorter-tailed and overall darker than gleaming white Roseate Tern. Often found in large flocks, especially in late summer. Gives a harsh screeching call "KEEE-yurrrr."
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