Acadian Flycatcher
Empidonax virescens
Small flycatcher with big peaked head and relatively long bill. Extremely similar to several other species, especially Alder and Willow Flycatchers. Greenish-olive above and pale whitish below. Note thin white eyering and very long wingtips. Best distinguished from other flycatchers by habitat and voice. Birds near the northern end of breeding range prefer shaded ravines with mix of hemlocks and deciduous trees; farther south, found in mature deciduous forests. Tends to stay high in the canopy. Song is an explosive “pwit-SIP!,” call note is a sharp “pweek!”
识别特征
Adults have olive upperparts, darker on the wings and tail, with whitish underparts; they have a white eye ring, white wing bars and a wide bill. The breast is washed with olive. The upper part of the bill is dark; the lower part is yellowish. This bird's song is an explosive peet-sa. The call is a soft peet. They also have a call similar to that of the northern flicker.[citation needed] A unique two-note song described as "ka-zeep" helps to identify this species.<p>Measurements:
分类信息
The 15 species of this genus were once all thought to be a single species, which was discovered in Acadia in present-day Nova Scotia. Differences in range, voice, and habitat eventually identified them as separate species. The present-day "Acadian flycatcher" is not found in Acadia.
- 学名
- Empidonax virescens
- 命名信息
- (Vieillot, 1818)
- 目
- Passeriformes
- 科
- Tyrannidae
- 属
- Empidonax
分布与栖息地
Its breeding habitat is deciduous forests, often near water, across the eastern United States and southwestern Ontario. These birds migrate through eastern Mexico and the Caribbean to southern Central America and the very northwest of South America in Colombia, western Venezuela, and Ecuador.<p>The numbers of these birds have declined somewhat in the southern parts of their range. Brown-headed cowbirds lay eggs in the nests of these birds in some areas. However, only 16% of cowbird young in Acadian flycatcher nests fledge successfully.<p>They wait on a perch in the middle of a tree and fly out to catch insects in flight (hawking), also sometimes picking insects from foliage while hovering (gleaning). They may eat some berries and seeds.<p>They make a loose cup nest in a horizontal fork in a tree or shrub.<p>The Acadian flycatcher is an excellent flier; it is extremely maneuverable, can hover, and can even fly backward. Curiously, there is no scientific information on hopping or walking by this bird.<p>As of October 2015 there have been 2 records of Acadian flycatcher in Europe, the first being a bird found dead in Iceland in 1967, and the second a bird found on the beach at Dungeness in Kent, England in September 2015, the latter's identity being established by DNA from its droppings.
- 繁殖区
- NA : c, e USA
- 非繁殖区
- Nicaragua to Venezuela and w Ecuador
- 迁徙
- Complete migrants
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Leaden Flycatcher
Myiagra rubecula
A long-tailed, slender songbird with fine bill. Males rich blue-gray above, white below, with a blue-gray bib with convex lower edge (curves upward at the edges). Crown paler than throat, lending male a bearded appearance in optimal light. Male Satin Flycatcher has uniformly dark head, blackish (not grayish) tail feathers, and concave bib edge. Female paler blue-gray above, with pale orange throat and breast. Inhabits varied woodlands, perches high in the canopy, often shakes the tail rapidly. Song a repeated two-note whistle; call a loud buzzing “zerp.”
Yucatan Woodpecker
Melanerpes pygmaeus
Like a small version of Golden-fronted Woodpecker. Found in woodland, beach scrub, semi-open wooded habitats; usually less numerous than Golden-fronted. Yucatan populations of Golden-fronted Woodpecker very similar in plumage, but Yucatan Woodpecker has a much shorter bill, ‘egg-yolk’ yellow feathering around the bill base (vs. reddish on local Golden-fronteds), and relatively wider white barring on back (looks silvery at a distance, vs. blackish overall on Golden-fronted). Voice is quite different from Golden-fronted.
Harris's Sparrow
Zonotrichia querula
Large sparrow that is largely restricted to the middle of North America. Breeds in boreal forest and shrubbery in the far north of central Canada, and winters in shrubby or weedy areas in the southern Great Plains. Adults have distinctive black face and pink bill. Immatures have plain brown face and splotchy black bib. White belly with dark streaks on sides. Dark crown feathers are beautifully edged with white. Visits feeders; occasionally strays east or west of normal range.
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