White-headed Woodpecker
Leuconotopicus albolarvatus
Distinctive woodpecker, unlikely to be confused with any other species. Almost entirely black with white head and small white wing patch. Males have red patch on back of crown; sexes otherwise alike. No other woodpecker shows clean white head and lack of patterning on back or belly. Found in coniferous forests, often in mountains. Usually seen in pairs or family groups. Listen for sharp "peek" notes, often rapidly doubled or tripled.
识别特征
It has a black body (approximately 20 cm (7.9 in) long) and white head. It has white primary feathers that form a crescent in flight. Males have a red spot at the back of the head.
分类信息
Most of the range is occupied by the nominate subspecies. In the southern part of the range, L. a. gravirostris, which has a longer bill - especially in males - and tail, is only found on mountaintops of the San Gabriel Mountains to San Diego County. Birds on Mount Pinos are somewhat intermediate. mtDNA cytochrome b and ATP synthase subunit 6 sequence data confirms this arrangement and also suggests that the Mount Pinos birds are closer to L. a. gravirostris (Alexander & Burns, 2006). Apparently, the larger bill of the southern subspecies is an adaptation for being better able to feed on the large, spiny cones of Coulter pines (Pinus coulteri). Some taxonomic authorities, including the American Ornithological Society, place this species in the genus Dryobates.
- 学名
- Leuconotopicus albolarvatus
- 命名信息
- (Cassin, 1850)
- 目
- Piciformes
- 科
- Picidae
- 属
- Leuconotopicus
分布与栖息地
The range of the white-headed woodpecker stretches in the mountains from British Columbia through southern California. They form nests in dead trees or snags and reproduce once per year.
- 迁徙
- Vertical migration
行为
Migration pattern: Vertical migration.
保护状况
Population trend: stable.
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Atuen Antpitta
Grallaria atuensis
Medium-sized antpitta found in elfin forest and páramo near or above treeline in the Andes of northern Peru. Tiny range. Typical antpitta shape: plump with short tail and long legs. Dull brownish plumage, darker above and buffier below. Sexes similar. Fairly common and much more conspicuous than most other antpittas; frequently seen bounding around in the open, though typically close to shrubby cover. Sometimes sings from a fairly prominent perch; listen for three piping whistles, the last note slurred upwards.
Timor Bushchat
Saxicola gutturalis
A striking long-tailed flycatcher. Male is gleaming white below and black above with a bold white shoulder patch. Female is reddish-brown above with a conspicuous white eyebrow and a whitish underside. Singles and pairs occupy the canopy of forest, woodland, and savanna within lowlands and hills. Confined to Timor, Rote, and Semau islands. Both sexes differ from Pied Bushchat in being whitish below and significantly longer-tailed. Song comprises a sequence of staccato notes: “sweet-cherrrgrrr-wichu.” Also gives a soft, grating “tchuk.”
Fire-tufted Barbet
Psilopogon pyrolophus
Beautiful emerald-green barbet. Note silvery cheeks, white forehead, and black chinstrap; namesake reddish tuft above the base of the bill is small and often difficult to see from a distance. Bulbous horn-colored bill has a large dark smudge down the center. Strange song is a loud accelerating creaking that is reminiscent of rusty machinery revving up.
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