Gray-chested Dove
Leptotila cassinii
Retiring, terrestrial dove of humid tropical forest in the lowlands. Heard more frequently than seen. Like other members of the genus, it can be found walking quietly on shady roadsides and trails, especially early and late in the day. It often flushes explosively and flies to a low perch in the understory. Told from White-tipped Dove and Gray-headed Dove by warm brown crown and hindneck, and duskier grayish chest. In flight, all Leptotila doves show white tail corners and rusty under the wings.
识别特征
The grey-chested dove is 22.5 to 28 cm (8.9 to 11.0 in) long and weighs 132 to 179 g (4.7 to 6.3 oz). The nominate subspecies has a pinkish gray forehead and face, dark brown crown and nape, and an iridescent grayish purple hindneck. Its upperparts are olive-brown with an iridescent green or purple mantle. The tail is darker than the back and the outer feathers have white tips. Its throat is white, the breast reddish gray, and the belly reddish. The eye is shades of yellow surrounded by bare gray skin that is reddish at its front and back. The legs and feet are red. Males and females are essentially alike but that the female is darker overall. L. c. rufinucha is paler than the nominate, with a purplish breast and a rusty buff crown and nape. L. c. cerviniventris is similar to rufinucha but the breast is a stronger purplish pink.
分类信息
The grey-chested dove is closely related to the Tolima dove (Leptotila conoveri) and ochre-bellied dove (L. ochraceiventris), and might form a superspecies with them. It has three subspecies, the nominate L. c. cassinii, L. c. cerviniventris, and L. c. rufinucha.
- 学名
- Leptotila cassinii
- 命名信息
- Lawrence, 1867
- 目
- Columbiformes
- 科
- Columbidae
- 属
- Leptotila
分布与栖息地
The nominate subspecies of grey-chested dove is found from Panama's Canal Zone into northern Colombia. L. c. cerviniventris is found from Chiapas in southeastern Mexico south through Belize, Honduras, Nicaragua, and northwestern Costa Rica into western Panama. L. c. rufinucha is found in southwestern Costa Rica and northwestern Panama. It inhabits secondary forest from sea level to at most 1,400 m (4,600 ft). On the Caribbean side of Costa Rica it is only found as high as 750 m (2,460 ft).
- 迁徙
- Resident species
行为
The grey-chested dove forages on the ground alone or in pairs; it does not flock. Though its diet is poorly known, it has been documented eating seeds and small insects.<p>The grey-chested dove's breeding season varies across its range. In Costa Rica it has two seasons, February to May and July to September. In Panama it breeds between February and September and in Colombia apparently from January to April. It builds a shallow platform nest of twigs and straw and places it from 1 to 5 m (3.3 to 16.4 ft) above ground on a tree branch or in a thicket or vine tangle. The clutch size is two eggs.<p>The grey-chested dove's song is "a single mournful monotonous note 'woOOOooo' which fades rapidly in and slowly fades out."
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Olive-backed Foliage-gleaner
Automolus infuscatus
Dark brown foliage-gleaner of mature rainforest understory. Warm dark brown body, with a clean whitish throat patch and reddish brown tail. Does not have prominent reddish brown in the wings like many other foliage-gleaners do; the clean whitish throat, plain face (without a strong eyebrow) and habit of foraging low are other good distinguishing features to tell it apart from other foliage-gleaners. Primarily found in the understory of mature rainforest. Listen for its song, a musical trill with stuttered introductory note, “ch-trrrrrrrr”, similar to that of Chestnut-crowned Foliage-gleaner from denser secondary growth habitats, but slightly lower and with a more distinct introductory note.
Bat Hawk
Macheiramphus alcinus
An acrobatic, swift-like raptor with angular wings and a massive gape; capable of snatching prey from the air and devouring it in a flash while still on the wing. Dark with varying amounts of white on the underside; African birds have patchy white throughout the underparts, while white is restricted to the throat and lower belly on New Guinean birds and solely to the throat in Southeast Asian birds. Inactive during the day; hunts at dawn and dusk, and occasionally into the night if light is sufficient. Generally uncommon and localized, most reliably encountered near large bat roosts in forested areas, but can also be seen over open forest, fields, and fringes of habitation.
Hall's Babbler
Pomatostomus halli
Large, conspicuous songbird with long decurved bill, very dark mask, broad whitish eyebrow, narrow dark-brown crown, and dark eye. White throat and breast form a well-defined bib and do not extend to belly; belly and undertail dark. Compare White-browed Babbler, in which white breast extends into belly and white eyebrow is much narrower than the crown stripe. Forages mostly on the ground in chattering flocks, in western Queensland.
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