Chestnut-collared Longspur
Calcarius ornatus
Sparrowlike ground-dweller; crouches low to the ground and walks with pattering footsteps. Breeding male shows beautiful chestnut nape, black-and-white head stripes, yellowish throat, and black belly. Females and nonbreeding birds are much more subtle. Tan overall with washed out face pattern, a slightly warmer nape, and indistinct streaks below. With a good view, look for shorter wingtips than other longspurs. In flight, note extensive white on edges of tail. Often found in flocks, sometimes mixed other longspurs. Breeds in grassy prairies, where males give a complex descending song. Winters in fields with short grass.
识别特征
These birds have a short conical bill, a streaked back and a white tail with a dark tip. In breeding plumage, the male has black underparts, a chestnut nape, a yellow throat and a black crown. Other birds have light brown underparts, a dark crown, brown wings and may have some chestnut on the nape.<p>Measurements:
分类信息
Genus: Calcarius; Family: Calcariidae; Order: Passeriformes.
- 学名
- Calcarius ornatus
- 命名信息
- (Townsend, JK, 1837)
- 目
- Passeriformes
- 科
- Calcariidae
- 属
- Calcarius
分布与栖息地
This bird breeds in short and mixed grass prairies in central Canada and the north central United States. In winter, they migrate in flocks to prairies and open fields in the southern United States and Mexico. Like other prairie birds, they have disappeared from some areas because of habitat loss but are still fairly common.<p>Controlled burns may benefit this species as they feed on low-growing plants that are more easily spotted after a fire.
- 繁殖区
- NA : sc Canada and nc USA
- 非繁殖区
- to Mexico
- 迁徙
- Complete migrants
行为
Migration pattern: Complete migrants.
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Sykes's Nightjar
Caprimulgus mahrattensis
A small, pale gray nightjar with a short tail. Note the fine black barring on the tail, small black spots on the upperparts, weak rust-colored collar, and relatively faint rust-colored spots on the wings. In flight, note the white patch extending across the first three flight feathers and the white edges to the tail. Nocturnal. Inhabits dry and arid scrub and grasslands.
Eastern Woodhaunter
Automolus subulatus
This fairly small brown bird is a shy forest-dwelling species; it is usually seen in the lower or middle levels of the forest interior. Most similar to foliage-gleaners, which can be very similar in plumage. Look for the woodhaunter’s blurry buffy streaking on the head and breast, rather long straight bill, and lack of a pale eyebrow. Does not climb up tree trunks like a woodcreeper, but forages by hopping around tangles, mosses, and vines, rummaging around looking for invertebrates. Most often seen singly or in pairs, sometimes accompanying mixed-species flocks. Listen for two nasal whistles followed by a hard staccato trill. Occurs throughout western Amazonia.
Large-billed Reed Warbler
Acrocephalus orinus
Poorly known, small gray-brown bird with a large bill, a flat forehead, and a short, pale supercilium. Extremely similar to Blyth’s Reed Warbler, but the Large-billed Reed Warbler has a longer bill, longer legs, and slightly shorter wings. Breeds in damp scrubland at high altitudes. Migratory range and habitats are unclear. Song said to be faster, more complex than that of the Blyth’s Reed Warbler.
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