Clark's Nutcracker
Nucifraga columbiana
This relative of jays and crows is pale gray with a whitish face and black wings. Sexes are similar; juveniles are browner than adults. Found almost exclusively in coniferous forests at high elevations; feeds on pine cone seeds and stashes thousands of them in various places to eat later in the winter. Often found in flocks. Sometimes visits feeders. Similar in color to Canada Jay, but especially note bill shape: long, slender, and sharply pointed.
识别特征
Nucifraga columbiana can reach an average length of 28.8 cm (11.3 in). It is slightly smaller than its Eurasian relative the spotted nutcracker (N. caryocatactes). Most of its body has feathers that are ashy-grey and loose in texture. The wings and tail are black and white. The central tail feathers are black and the outer ones white. The bill, legs and feet are also black. The bill is long, stout, and cone-shaped.
分类信息
Originally placed in the genus Corvus by Lewis, Clark's nutcracker was later included in Nucifraga by Wilson, which also includes two Old World species with similar lifestyles and habitats.
- 学名
- Nucifraga columbiana
- 命名信息
- (Wilson, A, 1811)
- 目
- Passeriformes
- 科
- Corvidae
- 属
- Nucifraga
分布与栖息地
This species is present in western North America from British Columbia and western Alberta in the north to Baja California and central New Mexico in the south. There is also a small isolated population on the peak of Cerro Potosí, elevation 3,700 metres (12,200 ft), in Nuevo León, northeast Mexico. It is mainly found in mountains at altitudes of 900–3,900 metres (3,000–12,900 ft) in conifer forest. It is not migratory except in the sense of moving back and forth locally between areas of higher and lower elevation. Outside the breeding season, it may wander extensively to lower altitudes and also further east as far as Illinois (and exceptionally, Pennsylvania), particularly following any cone crop failure in its normal areas.
- 迁徙
- Resident species
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类

Rusty-tailed Flycatcher
Ficedula ruficauda
Medium-sized brown flycatcher with an orangish tail. Note upright posture and broad-based pale bill. Forages quietly and usually singly in the lower levels of forest edge, both through gleaning and flycatching. Breeds in open forests in hilly and montane areas at 1500-3000 meters of elevation; in the winter, favors forest edge and clearings. Song is a descending whistle followed by a brief sputter of shorter notes: “Weee-pewchewchi!”

Japanese Leaf Warbler
Phylloscopus xanthodryas
Small songbird, a member of the Arctic Warbler complex, this species looks essentially identical to Arctic Warbler and Kamchatka Leaf Warbler but is more evenly yellowish. Normally only distinguished in the field by breeding range and song: breeds in forests on all of the main Japanese islands except Hokkaido, where it is replaced in summer by Kamchatka Leaf Warbler. Favors foothill to montane areas with dense brushy understory; can be found in more open wooded habitats in migration and on wintering grounds. Song resembles that of Arctic in general pitch and register but is less uniform, like a more rising and falling version of Arctic’s song. Call also similar but averages lower in pitch.

Mascarene Paradise-Flycatcher
Terpsiphone bourbonnensis
A pretty and distinctive bird that always lacks the long tail streamers possessed by some paradise-flycatchers. Note the rufous back and tail and the gray underparts. Males and females differ slightly: males have a black cap and a blue eye-ring, whereas females have a dark-gray cap without a distinctive eye-ring. Fairly common on Reunion in all types of humid forest. Rare on Mauritius in remnant rainforest patches. Calls include a tearing “sree-sreeet” and an agitated twittering. The song is a long musical series of “twee” notes.
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