Mindanao Bleeding-heart
Gallicolumba crinigera
A medium-sized ground dove of lowland forest floor. Bluish-gray on the head, back, and sides to the chest, with blackish wings, a pale gray shoulder and wingbars, a white throat and sides to the chest, a dingy pinkish belly, and an obvious dark red “bleeding heart” in the center of the chest. Note the scaling on the back. The central eastern race has more gray on the chest. Unlikely to be mistaken if seen well. The only other dove likely to flush from the ground would be Asian Emerald Dove. Voice is a low, upslurred hooting note.
分类信息
The Mindanao bleeding-heart is about 29 cm in length and weighs 184–204 g. The forehead, crown, nape and mantle are metallic green, slightly duller on the forehead and sides of the head. The back to rump is a chocolate brown with fringes of green. The upper and central tail coverts are purplish brown, the chin and throat are white. Most striking is a blood red patch on the breast, hence the common name. The lower breast to the undertail is a rusty orange that is its darkest on the breast and flanks and palest on the belly. The underwing is chestnut brown and blackish on the edges. The wing shield is a dull brown with broad tips which make three distinct wing bars. The sexes are similar in appearance though there may be some dimorphism in iris colouration. Juveniles are dark chestnut or reddish brown with some metallic fringes on the mantle and scapular.<p>Three subspecies are recognized:
- 学名
- Gallicolumba crinigera
- 命名信息
- (Reichenbach, 1851)
- 目
- Columbiformes
- 科
- Columbidae
- 属
- Gallicolumba
分布与栖息地
The Mindanao bleeding-heart exists (or used to exist) on the Philippine Islands of Samar, Leyte, Basilan, Mindanao, Bohol, and Dinagat. It is one of the three bleeding-heart doves that are native to their own particular island or islands of the Philippines. It naturally occurs in both primary and secondary tropical lowland rainforests up to an elevation of 750 m.
- 迁徙
- Resident species
行为
It is a shy bird which typically runs from danger, spending most of its time on the forest floor, and only flying short distances if flushed. It only perches in trees if frightened or when nesting or roosting. The call is a repeated woo-oo similar to that of most doves and pigeons. It is a rare sight because of its cryptic behaviour.<p>Courtship is characterized by slowly raising and lowering the wings at regular intervals of a few seconds. The female lays a single creamy white egg, which it will incubate for 15–18 days (depending on the weather) and the young are capable of flight within 15–16 days of hatching. The breeding period is thought to take place during the rainy season (March through June).<p>The birds feed on the forest floor, foraging for berries, seeds, worms and insects. In captivity they are typically fed grains, greens and parakeet seed.
保护状况
The main threats to the Mindanao bleeding-heart are deforestation and overhunting for food and for the pet trade. The status of the species is not sufficiently known for a definite assessment. Initially listed as being of least concern in 1988, it was subsequently uplisted to vulnerable in 1994, and further to endangered in 2000. With its exact rate of decline still unresolved, it was downlisted to vulnerable in the 2007 IUCN Red List with the population estimated at 1,000 to 2,499 mature individuals remaining.<p>This species' main threat is habitat loss with wholesale clearance of forest habitats as a result of logging, agricultural conversion and mining activities occurring within the range. Forest cover was estimated at just 29% on Mindanao, and as little as 433 km2 of old-growth dipterocarp forest remained on Samar and Leyte. These figures are continuing to decline thanks to continued deforestation.<p>Conservation actions proposed include to survey in remaining tracts of suitable habitat and areas with historical records, particularly on Samar and Leyte. Continue to advocate the effective protection of key sites and potential habitat. Propose remaining forests found to support the species for establishment as protected areas. Promote more effective enforcement of laws relating to hunting and trapping.
- 种群趋势
- declining
照片
分布
其他鸟类
Water Rail
Rallus aquaticus
Shy but generally not uncommon, this reclusive marsh bird is more often heard than seen; listen for its varied piglike squeals and grunts coming from dense vegetation. Favors fresh marshes and ponds with taller vegetation, especially reeds and rushes; in winter and freezing weather, sometimes in tidal marshes. Most often seen at muddy edges, walking stealthily; can move very quickly. About half the size of a moorhen. Note long, mostly red bill (unlike short, chickenlike bill of crakes), and barred flanks. Replaced in much of Asia by the Brown-cheeked Rail, with which it has minor overlap; very similar, but lacks the strong eye stripe of that species, has a darker throat and grayer breast and belly.
African Gray Flycatcher
Bradornis microrhynchus
A very plain gray-brown flycatcher of dry country. Note the distinct dark streaks on the crown and the dirty grayish underparts. Found in dry savanna and woodland habitats, usually in pairs or small groups, often sitting on open perches. Very similar to Pale Flycatcher, but found in drier habitat, and distinguished by the streaked crown and darker underparts. Similar to Spotted Flycatcher, but lacks streaking on the breast. Distinguished from all other flycatchers by the crown streaking. Gives quiet scratchy vocalizations.
Lesser Yellow-headed Vulture
Cathartes burrovianus
Found in savannas, wetlands, and other open areas, usually gliding low to the ground with wings held in a shallow V. Overall looks very much like the slightly larger Turkey Vulture (TV), but head is more colorful, with a yellow face and pale blue crown; at a distance, head appears paler than dark red head of TV. The upperwings show stronger whitish patches on the tips, rather than the pale brownish patches of TV.
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