Cassin's Vireo
Vireo cassinii
Fairly dull vireo, intermediate between Blue-headed and Plumbeous. Grayish-olive overall, but with yellowish flanks and greenish back. Note white spectacles contrasting with gray head and two whitish wingbars. Breeds in mixed coniferous forests, especially in mountainous areas; winters in Mexico. Often separable from Blue-headed and Plumbeous Vireos by range, but can overlap during migration and winter. Cassin's is less contrasty than Blue-headed, especially between the gray face and whitish throat, and the greenish back blends into the nape and crown. Some birds are best left unidentified.
分类信息
- 学名
- Vireo cassinii
- 命名信息
- Xántus, J, 1858
- 目
- Passeriformes
- 科
- Vireonidae
- 属
- Vireo
分布与栖息地
- 繁殖区
- NA, MA : sw Canada through w USA to Baja California (nw Mexico)
- 非繁殖区
- MA
- 迁徙
- Complete migrants
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类

White-winged Crossbill
Loxia leucoptera
Stocky, large-headed finch with a unique crossed bill. Males are pinkish-red with black wings and two bold white wingbars. Females yellowish overall. Nomadic; breeds at any time of year, whenever there is enough food available. Prefers spruce cones. Red Crossbill also has a crossed bill, but is duller overall without white wingbars. Often in small flocks. Rarely visits feeders. Listen for distinctive “machine-gun rattle” calls and high-pitched tooting, like a toy truck.

Yellow-vented Green-Pigeon
Treron seimundi
A rather dark green pigeon with black-tipped olive-green wings and a long needle-pointed tail. Both sexes have a white patch low on the belly and a lemon-yellow vent. Pin-tailed Green-Pigeon is similarly long-tailed, but lighter in color with warm tinges of yellowish-orange on the breast and brighter yellow wing feathers. Like many other green-pigeons, generally forages quite high in the forest canopy. Inhabits montane and foothill forests; occasionally in coastal lowlands. Generally uncommon to rare throughout its range. Gives a melodious, jumbled series of resonant and rather high-pitched cooing whistles.

Dot-winged Crake
Laterallus spilopterus
Small dark crake; brown above, speckled black and gray below, with black-and-white bars on the belly and vent. Occurs in both salt and freshwater marshes and damp grasslands. The song is a double-noted “tchip-pruu,” often repeated. Common call is a thin, downslurred "pwup."
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