Scaly-breasted Thrasher
Allenia fusca
A drab-colored and inconspicuous species typically found from the middle level to the canopy in woodlands, where it mostly feeds on fruits. This species can be distinguished from similarly shaped and colored Pearly-eyed Thrasher by its short dark bill and barred, not streaked, underparts. Song is a deliberate series of high-pitched squeaks and lower-pitched whistles. Most common call is a high, thin whistle.
识别特征
The scaly-breasted thrasher is approximately 23 cm (9.1 in) long and weighs 53 to 98 g (1.9 to 3.5 oz) with an average weight of 67 g (2.4 oz). With its rather short and slightly decurved bill, this thrasher resembles a thrush. Adults of the nominate subspecies have a dark gray-brown head and upperparts with a reddish tinge on the rump. Their tail is a darker brownish black and its outer feathers have white tips. The folded wing shows a single white bar. Their chin and throat are whitish with brown streaks. The underparts are whitish and the chest and flanks have bold gray-brown markings that give the eponymous scaly appearance.<p>The other subspecies differ mostly in size and the intensity of their upperparts' color. A. f. hypenema is the largest and is paler than the nominate. A. f. schwartzi is mid-sized and has more white on its tail. A. f. vincenti is the smallest and is darker overall than the nominate. A. f. atlantica compared to the nominate is more reddish brown above and has less white in the tail.
分类信息
The scaly-breasted thrasher was originally placed in genus Margarops with the pearly-eyed thrasher (M. fuscatus) but is now in the monotypic genus Allenia. It has five subspecies:
- 学名
- Allenia fusca
- 命名信息
- (Müller, PLS, 1776)
- 目
- Passeriformes
- 科
- Mimidae
- 属
- Allenia
分布与栖息地
The subspecies of scaly-breasted thrasher are found thus:<p>The scaly-breasted thrasher primarily inhabits forest and semi-open woodland and is also found around human settlements.
- 迁徙
- Resident species
行为
The scaly-breasted thrasher forages in trees; on different islands it hunts at different levels from low down to high in the canopy. It is omnivorous; its diet includes arthropods, fruits, and berries. It appears to eat a larger percentage of vegetable foods than other thrashers.<p>The scaly-breasted thrasher breeds in May and June. It builds a cup nest in a bush or tree. The clutch size is two or three.<p>The scaly-breasted thrasher's song is a "[s]eries of varied notes and phrases" similar to that of Mimus mockingbirds but softer and slower.
保护状况
- 种群趋势
- unknown
照片
分布
鸟叫声
其他鸟类
Northern Hawk Owl
Surnia ulula
Unique medium-sized owl of the boreal forest. Remarkably long-tailed for an owl; reminiscent of a small hawk in flight with quick, snappy wingbeats. Pale eyes give it an angry look. Brownish overall with white spotting above, barred underparts, and spotted crown. Feeds on small rodents by sight and sound. Often seen perched on the very top of a spruce tree or snag, surveying the surrounding landscape for prey. When rodent populations crash, large numbers of Northern Hawk Owls can move south of their normal range.
Fire-crested Alethe
Alethe castanea
A common understory bird found in the undergrowth or on the ground in forests of all types, from the lowlands into the foothills. The reddish-brown back and tail are noticeable when the bird flies away in the undergrowth, but look also for the white undersides, dark gray legs, and gray face. This alethe’s fiery crest is hard to see in the field and often appears as a reddish-brown crown stripe. Sometimes imitates other species, including illadopsises. Distinguished from Brown-chested Alethe by its plain gray face, dark legs, and reddish crown stripe. Gives a distinctive two-parted whistle, “go where?”, with a distinct pause between the notes.
Piping Woodcreeper
Deconychura typica
Fairly small, warm brown woodcreeper with buffy spots on breast and vague buffy eyebrow. Note relatively short, straight bill. Very similar to many other species of woodcreepers but smaller than most others in range; tail relatively longer than most other woodcreepers but this is of limited use in field identification. Focus on overall shape, especially the vaguely “pin-headed” look and scruffy feathers on the nape. Generally found in primary forest, usually following a mixed-species flock. Best identified by voice, though not a particularly vocal species. Song is a long, fast series of medium-pitched piping notes that at first speed up and then slow down at the end of the phrase.
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