Yellow-bellied Flycatcher

Empidonax flaviventris

Small flycatcher, extremely similar to several other species. Generally shy and inconspicuous; breeds in spruce forests often near boggy areas. Migrants tend to be found in denser wet areas within woods. Olive-greenish above with distinctive yellow wash on throat and belly. Black wings with bold white wingbars. Nearly identical to Western Flycatchers, but limited range overlap. Within range, main confusion species is Least Flycatcher. Bright yellow throat and belly is usually enough to identify Yellow-bellied Flycatcher, but some worn birds can be very similar. Song is similar to Least Flycatcher ("chebek") but more slurred, with a soft buzzy tone. Not frequently repeated like Least Flycatcher. Soft whistled call note, "pwee," unlike Least's sharp "whit" call.

识别特征

Adults have greenish upperparts and yellowish underparts (especially on the throat), with a dusky wash on the chest. They have a white or yellow eye ring that lacks the teardrop projection of Pacific-slope (E. difficilis) or cordilleran (E. occidentalis) flycatchers, white or yellowish wing bars that contrast strongly against the black wings, a broad, flat bill, and a relatively short tail when compared to other members of the genus. The upper mandible of the bill is dark, while the lower mandible is orange-pink. DNA testing in 2014 confirmed a field mark, involving the extent of buffy edging on the secondaries, to reliably distinguish this species from the two so-called "Western Flycatchers."<p>Measurements:<p>Yellow-bellied flycatchers wait on a perch low or in the middle of a tree and fly out to catch insects in flight, sometimes hovering over foliage. They sometimes eat berries or seeds.<p>The yellow-bellied flycatcher's song can be transcribed as a rough, descending "tse-berk", which can be similar to the more common least flycatcher's snappier, more evenly pitched "che-bek."

分类信息

学名
Empidonax flaviventris
命名信息
(Baird, WM & Baird, SF, 1843)
Passeriformes
Tyrannidae
Empidonax

分布与栖息地

繁殖区
NA : wc Canada to se Canada and ne USA
非繁殖区
MA
迁徙
Complete migrants

保护状况

种群趋势
rising

照片

分布

鸟叫声

其他鸟类

Medium Egret

Medium Egret

Ardea intermedia

A stocky egret that is larger than Eastern Cattle and Little Egrets, but smaller than the Great Egret. Often confusing and difficult to identify, this bird is truly intermediate between potential confusion species. Things to look for include a yellow bill that is shorter than Great Egret but longer than Eastern Cattle Egret, a relatively rounded head, and shorter legs than Great Egret, approaching Eastern Cattle Egret. Like most egret species, associates with all types of water bodies including wet fields, often flocking with other egrets.

Prairie Warbler

Prairie Warbler

Setophaga discolor

Small warbler, yellow overall with black streaks on sides and unique face pattern. Upperparts are duller olive. Reddish streaks on back are distinctive, but can be difficult to see or absent on immatures. Long tail is often pumped up and down, but not as consistently as Palm Warbler. Forages for insects in a range of shrubby habitats, from cedar-studded fields to regenerating woods to mangroves in Florida. Winters in Florida and the Caribbean.

Buru Bush Warbler

Buru Bush Warbler

Locustella disturbans

A sparrow-sized dark warbler with an often scruffy-looking, graduated tail. Has dark chestnut-brown upperparts, a whitish eyebrow, a distinct white throat, and dull grayish underparts. Formerly grouped with Buru Bush Warbler and Seram Bush Warbler under the name “Chestnut-backed Bush Warbler.” A secretive inhabitant of montane and foothill forest, often creeping around on or near the ground. Darker above and dingier below than Gray’s and Middendorff's Grasshopper-Warblers, and also has a clean-cut white throat; almost identical to Sulawesi and Seram Bush Warblers, but ranges do not overlap. Calls include a sharp metallic “chit” and a drawn-out, wavering buzzy note, “tzeeoooreee.” There is some variation in songs, which usually comprise three high-pitched buzzing notes, “tzeeee-tzeee-tzeee,” higher-pitched on the final note. Song includes a high, liquid-sounding “tzi-tzee”, as well as a longer, more repetitive “tzi-tzee, tzi-tzee, tzi-tzee.”

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