Laughing Gull
Leucophaeus atricilla
Slender, medium-sized gull with long wings. Medium-gray upperparts. Breeding plumage shows black head with white eye arcs, small white spots on black wingtips, and deep red bill and legs. Nonbreeding plumage has smudgy gray cheek and dark bill and legs. Juveniles are browner with neat scaly pattern on upperparts. The most common black-hooded gull on the Atlantic and Gulf coasts of North America; common in the Caribbean and on both coasts of Central America and northern South America. Almost exclusively coastal, especially on beaches and mudflats; rarely ventures far inland. Compare with Franklin’s Gull, which is slightly more compact and shorter-billed. Laughing also has narrower eye arcs and smaller white spots on wingtips.
识别特征
This species is 36–41 cm (14–16 in) long with a 98–110 cm (39–43 in) wingspan and a weight range of 203–371 grams (7.2–13.1 oz). The summer adult's body is white apart from the dark grey back and wings and black head. Its wings are much darker grey than all other gulls of similar size except the smaller Franklin's gull, and they have black tips without the white crescent shown by Franklin's. The beak is long and red. The black hood is mostly lost in winter.<p>Laughing gulls take three years to reach adult plumage. Immature birds are always darker than most similar-sized gulls other than Franklin's. First-year birds are greyer below and have paler heads than first-year Franklin's, and second-years can be distinguished by the wing pattern and structure.
分类信息
- 学名
- Leucophaeus atricilla
- 命名信息
- (Linnaeus, 1758)
- 目
- Charadriiformes
- 科
- Laridae
- 属
- Leucophaeus
分布与栖息地
It breeds on the Atlantic coast of North America, the Caribbean, and northern South America. Northernmost populations migrate farther south in winter, and this species occurs as a rare vagrant to western Europe. The laughing gull's English name is derived from its raucous kee-agh call, which sounds like a high-pitched laugh "ha... ha... ha...".<p>Laughing gulls breed in coastal marshes and ponds in large colonies. The large nest, made largely from grasses, is constructed on the ground. The three or four greenish eggs are incubated for about three weeks.
- 迁徙
- Complete migrants
保护状况
- 种群趋势
- rising
照片
分布
鸟叫声
其他鸟类

Talaud Rail
Gymnocrex talaudensis
An unmistakable, little-known hulking forest rail with a large yellow bill, an all-rufous head and neck, forest-green upperparts, and a blackish belly. Also note the striking pale blaze behind the eye. An extremely shy terrestrial bird with a very limited range in the Talaud Islands. Inhabits forest understory and marshy areas along forest edge. Calls include deep “ump-ump-ump” series and a hurried, high-pitched “peet-peet-peet.”

Black-and-white Becard
Pachyramphus albogriseus
Small becard occurring from Venezuela to Peru, mainly on the east slope of the Andes, and disjunctly in Costa Rica and Panama. Mostly found in foothills, in middle to upper levels of humid montane forest. Male is mostly gray with bold white edges on the wing feathers and a black cap with pale spectacles. Compare with White-winged Becard, which has a black back and dark lores. Female is very different; look for her brown cap bordered with black, white spectacles, pale yellowish belly, and tawny edges on wing feathers. Extremely similar to Cryptic Becard, with potential range overlap on the east slope of the Andes in Ecuador and Peru. Male Black-and-white shows a broader upper wingbar, darker lores, a blacker upperside of the tail, and stouter bill than Cryptic. Female Black-and-white has a brighter rufous crown with a broader black border. These features may all be difficult or impossible to assess in the field; some birds are best left unidentified. Also note voice: song a slow series of one or several sweet downslurred whistles followed by an upslurred whistle, often repeated two or three times. Cryptic’s song is faster, with shorter notes.

House Crow
Corvus splendens
A slender, blackish medium-sized crow with a long bill. The grayish nape and sides form a paler collar that contrasts with the glossy black body. Primarily a scavenger, feeding on leftover rubbish from humans. Found in a wide range of habitats mostly around human habitation. Their call is a loud and harsh “kaa kaa kaa.”
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