Band-tailed Barbthroat
Threnetes ruckeri
Scarce hummingbird of humid evergreen forest and edge in tropical lowlands. Favors shady understory, especially with Heliconia flowers. Usually visits flowers briefly and whips away with a sharp buzzy squeak. Note long arched bill (yellowish below), striped face, blackish throat patch, and rusty breast patch. Striking tail pattern, black with white tips, and a white base that is only readily seen when the tail is spread.
识别特征
The band-tailed barbthroat is 10 to 11 cm (3.9 to 4.3 in) long. Males weigh 5.5 to 7 g (0.19 to 0.25 oz) and females 5 to 7 g (0.18 to 0.25 oz).The adult male of the nominate subspecies has bronze-green upperparts, a dark ear patch and chin, and a dusky malar stripe. The tail is dark with white bases and tips to the feathers that create a black band near the end. The throat is ochraceous and the underparts are otherwise gray with some green feathers. It has a nearly straight bill. As with other hermit hummingbirds, the sexes are similar; the female's bill is somewhat more decurved than the male's and the plumage has less contrast among the throat, breast, and belly. Young birds resemble the adult but have ochraceous feather edges. T. r. venezuelensis has a somewhat larger ochraceous throat patch than the nominate. T. r. ventosus has a much larger and bright orange throat patch and an ochraceous tinge to the belly.
分类信息
The band-tailed barbthroat has the three subspecies listed. A fourth proposed subspecies, T. r. darienensis of the Panama-Colombia border area, shares the characteristics of all three recognized subspecies. The band-tailed barbthroat and the other two members of its genus pale-tailed barbthroat (T. lecurus) and sooty barbthroat (T. niger) form a superspecies.
- 学名
- Threnetes ruckeri
- 命名信息
- (Bourcier, 1847)
- 目
- Apodiformes
- 科
- Trochilidae
- 属
- Threnetes
分布与栖息地
T. r. ventosus is the northernmost subspecies of band-tailed barbthroat. It is found from eastern Guatemala and Belize through Honduras, Nicaragua, and Costa Rica into Panama. The nominate T. r. ruckeri is found from northern and western Colombia south through western Ecuador almost to Peru. T. r. venezuelensis is found in northwestern Venezuela. The species inhabits the understory and edges of primary forest and old second growth, and also semi-open shrublands, thickets, and plantations. In elevation it ranges from sea level to 1,200 m (3,900 ft).
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Visayan Babbler
Sterrhoptilus nigrocapitatus
A fairly small bird of lowland and foothill forest and edge; endemic to Samar, Leyte, and Bohol, though lumped with Calabarzon Babbler under “Black-crowned Babbler” by some taxonomies. Has a gray back and cheek with fine pale streaks, dark wings and tail with white outer tail feathers, white underparts, a pale rufous throat, and a black crown. Note the slender black bill. Often joins mixed-species flocks and sometimes hangs upside down while feeding. Somewhat similar to Green-backed Whistler, especially from below, but smaller, with a pale rufous throat and a black crown. Voice includes a medium-pitched “poo piuu!” with the second note downslurred.
Yemen Serin
Crithagra menachensis
Small, slim seedeater of the southern Arabian highlands. Brown overall, with a buffy face and whitish underparts. , Note blurry pale eyebrow, fine dark streaks on the crown and upper back, and blotchy streaking on the underparts. Found in rocky montane areas, both with and without trees and shrubs. Sometimes on human structures. Usually in small groups. The song is a simple series of whistles and trills, and calls include rising “swiiit” notes, “chwee” notes, and dry rattles. Similar to Olive-rumped Serin, but has a stronger facial pattern and lacks an olive rump. Also tends to be found in more barren areas.
Speckled Hummingbird
Adelomyia melanogenys
Small brownish hummingbird with distinctive black cheek and pale buffy eyebrow. Throat variably speckled; some populations are cleaner than others. Green back; dark tail with buffy corners. Face pattern could recall a hermit, but combination of small size, straight dark bill, and squared tail should alleviate any confusion. Widespread and fairly common in the Andes, where it forages low within forest or at the forest edge. Found from 1,000–3,000m. Visits feeders.
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