Long-billed Gnatwren
Ramphocaenus melanurus
Very small bird of humid tropical forest and edge. Favors vine tangles at mid-upper levels, where moves actively, holding its tail cocked and flopping it from side to side. Appearance is distinctive, with buffy face, very long thin bill, and fairly long tail with white tips. Similar to Chattering Gnatwren but lacks the extra white spots on outer tail feathers. Easily overlooked, but rising and falling trilled song reveals its presence.
识别特征
Adult trilling gnatwrens are 12–13 cm (4.7–5.1 in) in length and weigh 8–11 g (0.28–0.39 oz). They have a long, thin bill and a short cocked tail. The upperparts are grey-brown, with rufous on the sides of the head. The throat is white, shading to buff on the rest of the underparts. The tail is black with white tips to all but the central feathers, and is frequently wagged. R. m. trinitatis, of eastern Colombia, Venezuela and Trinidad has paler underparts, and buff flanks and head sides.The call is a trilled drdrdrdrdrdrdrdrdrdr.
分类信息
The trilling gnatwren was described by the French ornithologist Louis Pierre Vieillot in 1819 from a specimen collected in Brazil. He coined the binomial name Ramphocaenus melanurus. The genus name Ramphocaenus means "unusual beak", from the Ancient Greek rhamphos (ῥάµϕος, "beak") and cænos (καινός, "strange"). The specific epithet combines the Ancient Greek melas "black" and oura "tail". A molecular phylogenetic study published in 2018 found that two subspecies of Ramphocaenus melanurus formed a separate clade. The subspecies were split off to become the chattering gnatwren and the English name of this species was changed from "long-billed gnatwren" to "trilling gnatwren".<p>Thirteen subspecies are recognised:
- 学名
- Ramphocaenus melanurus
- 命名信息
- Vieillot, 1819
- 目
- Passeriformes
- 科
- Polioptilidae
- 属
- Ramphocaenus
分布与栖息地
It is found in the undergrowth and vines of dry forest and secondary woodland from Mexico south to Peru and Brazil, and on Trinidad.
- 迁徙
- Resident species
行为
Trilling gnatwrens build a deep cup nest very low in a small plant or sapling. The two white eggs are incubated by both parents for 16–17 days to hatching, with a further 11–12 days to fledging.<p>Trilling gnatwrens forage actively in vegetation, eating mainly insects, insect eggs and spiders. They usually occur in pairs or family groups.
保护状况
- 种群趋势
- declining
照片
鸟叫声
其他鸟类
Gorgeted Sunangel
Heliangelus strophianus
Unmistakable; glittering pinkish-purple throat is distinctive in good light, but also note the snowy white chest band, which is always obvious. Medium-sized with a rather short, straight bill. Like other sunangels, holds wings out for a few seconds after it lands. Based on plumage, could be confused with Purple-throated Woodstar, but the sunangel is larger with a much different flight style. The only sunangel within limited range on the west slope of Andes; occurs mostly in Ecuador, but barely extends into Colombia. Occurs in a rather narrow elevational band in the upper subtropical zone from around 1,700 to 2,300 m. Can be seen at all levels in the cloud forest, edges, and gardens, but most frequently at middle heights within the forest. Visits feeders.
Antioquia Brushfinch
Atlapetes blancae
Rare and endangered brushfinch thought to be possibly extinct until its rediscovery in 2018. It is only known from a few locations in the Colombian Andes north of the city of Medellín. Quite similar to the widespread Slaty Brushfinch, but is paler, lacks the white spot in the wing, and shows little or no dark mustache streak. It has been observed in remnant patches of native woodland and scrub as well as in adjacent cultivated areas.
Wompoo Fruit-Dove
Megaloprepia magnifica
Enormous colorful rainforest pigeon with green upper-wings and back, and a pale gray head. Underwings and belly are bright yellow, with a purple chest. Common in rainforests along the east coast of Australia, as well as New Guinea. Calls frequently with a loud explosive "Wom-Pooooo".
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