Brewer's Sparrow
Spizella breweri
Small, drab sparrow of scrubby areas in western North America, from Alaska to Mexico. Slender and long-tailed, similar in shape and size to Chipping and Clay-colored Sparrows. Note the pale gray nape, pale lores, and plain facial pattern. Breeds mostly in sagebrush; winters in loose flocks in any brushy or grassy area, often with other sparrows. Song is a long series of buzzy, reedy notes mixed with trills; tones and long duration of song are unique.
分类信息
- 学名
- Spizella breweri
- 命名信息
- Cassin, 1856
- 目
- Passeriformes
- 科
- Passerellidae
- 属
- Spizella
分布与栖息地
- 繁殖区
- NA : wc
- 非繁殖区
- to c Mexico
- 迁徙
- Complete migrants
行为
These birds migrate to the southwestern United States south to central Mexico. These birds forage primarily in shrubs or in low vegetation, but also on the ground. They mainly eat insects in summer with seeds becoming a more important part of the diet at other times of the year. They usually forage in flocks outside of the breeding season, sometimes with other sparrows. The female typically lays three to four eggs (up to five) in a cup nest in low shrubs.<p>Brewer's sparrow has decreased in some parts of its range. Causes are not well understood, but it is suspected that the decline is due at least in part to destruction of sagebrush habitat. Additional information on resource use and limitation during the wintering season is desperately needed. When the timberline sparrow was still considered a good species, Brewer's sparrow was classified as near threatened by the IUCN. However, as only entire species are evaluated for the IUCN Red List, following the merger the entire population of S. breweri is classified as species of least concern.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
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Synoicus ypsilophorus
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Golden-headed Cisticola
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Tiny, sandy-colored bird with short tail and dark-streaked back. Breeding adult males have orange-gold crown. Song a thin, high-pitched, drawn-out buzzing. Inhabits grasslands of northern and eastern Australia, where perches prominently. In similar grassland habitats, Tawny Grassbird has much longer tail. Very similar Zitting Cisticola always has a streaked crown and a very different “tick-tick-tick” song but otherwise almost identical.
Philippine Green-Pigeon
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A medium-sized pigeon of lowland and foothill forest canopy, with green underparts, head, and rump, a gray crown, yellow wingbars and edges to the flight feathers, a whitish belly, and white under the base of the tail. Note the whitish bill with a reddish base and the blue eyes. Male has a maroon shoulder and back, where the female is green. Similar to Thick-billed Green-Pigeon, but Philippine has a thinner bill and lacks the green skin around the eye. Female resembles female Pink-necked Green-Pigeon, but that species has yellow marks only on the edge of the wing. Voice is typical of green-pigeons, including a rising-and-falling out-of-tune whistled song.
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