Gray Kingbird
Tyrannus dominicensis
A relatively pale kingbird, medium-gray above and white below with a darker face mask. Primarily a Caribbean species with limited range in U.S.; found around the edge of dense woodland, especially near the coast. Also seen in more suburban areas. Often perches conspicuously on a snag, treetop, or powerline. Feeds on insects. Listen for its high-pitched twittering calls. Compare with Eastern and Loggerhead Kingbirds; Gray Kingbird has lighter gray upperparts, a thicker bill, and lacks white tail tips.
识别特征
The adult gray kingbird is an average-sized kingbird. It measures 23 cm (9.1 in) in length and weighs from 37 to 52 g (1.3 to 1.8 oz). The upperparts are gray, with brownish wings and tail, and the underparts are white with a gray tinge to the chest. The head has a concealed yellow crown stripe, and a dusky mask through the eyes. The dark bill is heavier than that of the related, slightly smaller, tropical kingbird. The sexes are similar, but young birds have rufous edges on the wing coverts, rump and tail.<p>The call is a loud rolling trill, pipiri, pipiri, which is the reason behind many of its local onomatopoeiac names, like pestigre or pitirre, in the Spanish-speaking Greater Antilles, or petchary in some of the English-speaking islands.
分类信息
The gray kingbird was formally described in 1788 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's Systema Naturae. He placed it with the shrikes in the genus Lanius and coined the binomial name Lanius dominicensis. The specific epithet is from the locality Santo Domingo, now Hispaniola. Gmelin based his description on "Le tyran de S. Domingue" that had been described and illustrated in 1760 by the French zoologist Mathurin Jacques Brisson. The gray kingbird is now one of 13 species placed in the kingbird genus Tyrannus that was introduced in 1799 by the French naturalist Bernard Germain de Lacépède. A molecular genetic study published in 2020 found that the gray kingbird was sister to the giant kingbird (Tyrannus cubensis).<p>Two subspecies are recognised:
- 学名
- Tyrannus dominicensis
- 命名信息
- (Gmelin, JF, 1788)
- 目
- Passeriformes
- 科
- Tyrannidae
- 属
- Tyrannus
分布与栖息地
It is found in increasing numbers in the state of Florida, and is more often found inland though it had been previously restricted to the coast. It breeds from the extreme southeast of the United States, mainly in Florida, as well as Central America, and through the West Indies south to Venezuela, Trinidad and Tobago, the Guianas, and Colombia. Northern populations are migratory, wintering on the Caribbean coast of Central America and northern South America. Several vagrant populations are known to exist in the Northeastern United States. It favors tall trees and shrubs, including the edges of savanna and marshes.
- 繁殖区
- NA : se USA and West Indies
- 非繁殖区
- Panama to Guyana
- 迁徙
- Complete migrants
行为
Like other kingbirds, these birds aggressively defend their territory against intruders, including mammals and much larger birds such as crested caracaras, red-tailed hawks and broad-winged hawks by mobbing.<p>Gray kingbirds wait on an exposed perch high in a tree, occasionally sallying out to feed on insects (such as bees, dragonflies, wasps and beetles), their staple diet. They also eat small fruits and berries depending on its availability. Fruits and berries make up one fifth of their daily diet. Spiders and small lizards are occasionally eaten.<p>It makes a flimsy cup nest in a tree. The female incubates the typical clutch of two cream eggs, which are marked with reddish brown.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
White-browed Shrike-Babbler
Pteruthius aeralatus
A small, stout bird with a large head, usually found at mid-level in forests. Male is smartly attired: clean white below and black above with a gray back, a white eyebrow, and two bright, flame-like orange stripes towards the wingtips. Females have the same general patterning, but are much more faded, replacing black with gray and orange with yellow-green. Often joins mixed flocks in foothill and montane forests, where it can be fairly common. Song is a forceful series with slight breaks every second or third note: “dyudyu-dyu-dyudyu!”
Pine Warbler
Setophaga pinus
A medium-sized, rather robust and long-tailed warbler, with a noticeably stout bill. Variable plumage, from bright adult males with extensive yellow throat to extremely dull grayish-brown immature females. Always look for two white wingbars, diffuse streaking on the sides of the breast, large bill, and long narrow tail with a shallow notch. Well-named: almost always found in pine trees throughout the year. In spring and summer, listen for loud musical trill (compare with Chipping Sparrow and Dark-eyed Junco). Occasionally visits feeders, especially for suet. A short-distance migrant, wintering entirely in the United States.
Terek Sandpiper
Xenus cinereus
Unique smallish wader with stumpy bright orange legs and a noticeably upturned bill. Plumage gray overall with white belly, but in flight shows conspicuous white trailing edge to wings. Breeds in valley floodplains in tundra and taiga. In the non-breeding season, occurs singly or in flocks in varied wetland habitats, from fresh marshes to tidal mudflats, and often apart from other shorebirds. Feeds by dashing after insects and also by probing bill in mud, like a mini-godwit.
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