Buff-browed Chachalaca
Ortalis superciliaris
Small chachalaca, brown overall with a pale buff eyebrow. Found in edge habitats, thickets, and young second-growth forests, even at the edge of urban areas. Song is typical of a chachalaca: a noisy, high-pitched, raucous “TJURRE-wruh,” repeated continually.
识别特征
The buff-browed chachalaca is the smallest member of genus Ortalis. It is 42 to 46 cm (1.4 to 1.5 ft) long. Its crown, neck, and upper breast are gray and the rest of its upperparts brown. Its lower breast and belly are tan. The central tail feathers are dark green-brown with chestnut tips; the outer ones are chestnut. Unique among Ortalis, it has a prominent supercilium that can be any color from buffy white to pale cinnamon. Its facial skin is dark slate gray.
分类信息
What is now the buff-browed chachalaca was previously a subspecies of what was then called variable chachalaca (Ortalis motmot). (Confusingly, after the split the International Ornithological Committee (IOC) renamed O. motmot "little chachalaca" but the American Ornithological Society (AOS) and the Clements taxonomy retained the name "variable" for it.) It is monotypic.
- 学名
- Ortalis superciliaris
- 命名信息
- Gray, GR, 1867
- 目
- Galliformes
- 科
- Cracidae
- 属
- Ortalis
分布与栖息地
The buff-browed chachalaca is found in northeastern Brazil south of the Amazon River in parts of the states of Pará, Maranhão, Ceará, Tocantins, and Piauí. It is a bird of the lowlands, inhabiting scrublands and forest thickets including those in heavily degraded areas.
- 迁徙
- Resident species
行为
No formal study of the buff-browed chachalaca's diet has been published, but it has been observed eating palm fruits and some flowers.<p>A study of the buff-browed chachalaca's breeding phenology in Pará found a nesting season between December and February, but active nests have been found in other months as well. One described nest was a flat structure of twigs with leaves and grasses. Nests have been found in a tree fork, on top of tall grass, and in dense bushes. The typical clutch size is two or three eggs.<p>The buff-browed chachalaca's vocalizations are "typical of Ortalis"; they are higher pitched and less raucous than those of chestnut-headed chachalaca (O. ruficeps).
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Glittering-bellied Emerald
Chlorostilbon lucidus
Small green hummingbird found in a variety of open and semiopen habitats, such as forest edges, deserts, savannas, and gardens. Visits feeders. Iridescent green body with a forked dark blue tail and dark wings. Males have a black-tipped red bill with a blue throat, while females have a white belly, black mask, and a black bill with a red base.
Yellow-bellied Elaenia
Elaenia flavogaster
Rather bulky small flycatcher, widespread in tropical lowlands. Fairly common in overgrown brushy clearings, savannas, and other semi-open areas with scattered bushes. Looks like many other small flycatchers, and where multiple species of elaenias occur it is often not possible to identify birds to species. On Yellow-bellied, note its spiky, white-based crest (rarely held flattened), burry drawled call, whitish wingbars, and pale yellow belly; does not flick its wings or tail.
Micronesian Rufous Fantail
Rhipidura versicolor
Small, active songbird with long, pale-tipped tail and warm brownish-orange on the forehead, rump, and tail base. Grayish brown above and pale below overall, with a white throat and black-speckled breast. Frequently cocks and fans tail. Endemic to the Mariana Islands (Saipan, Tinian, Agiguan, and Rota) and Yap, in the Carolina Islands. Extinct on Guam. Inhabits a wide range of habitats, from remnant native forests to towns. High-pitched, tinkling song often has a descending quality. Formerly grouped with other closely related species under “Rufous Fantail.”
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