Rameron Pigeon
Columba arquatrix
Big, dark pigeon with a gray head, and bright yellow feet, bill, and eye ring. Plain in flight. Found in forest, plantations, and woodland. In most of its range, it is a montane species that is restricted to high and middle elevations. Often in small flocks, especially near fruiting trees. Common vocalization is a raspy “brrruuur” call, usually followed by several series of quick hoots. Separated from all other pigeons in its range by its bright yellow bare parts.
识别特征
The adult male African olive pigeon is a large pigeon at 37 to 42 cm (15 to 17 in) in length and a weight of 300 to 450 g (11 to 16 oz). Its back and wings are maroon, with the shoulders heavily speckled with white spots. The underparts are maroon with heavy white spotting, and the head is grey with yellow patches around the eye, and a yellow bill. The neck plumage, used in display, is streaked maroon and white, the underwing and undertail are dark grey, and the feet are yellow.<p>Females are very similar but somewhat duller. Juvenile birds have the maroon and grey replaced with dark brown, the bare parts are a dull greenish-yellow, and the wing feathers have pale fringes. In flight, this pigeon looks very dark. Its flight is quick, with the regular beats and an occasional sharp flick of the wings which are characteristic of pigeons in general. The call is a loud coo coo.
分类信息
- 学名
- Columba arquatrix
- 命名信息
- Temminck, 1808
- 目
- Columbiformes
- 科
- Columbidae
- 属
- Columba
分布与栖息地
This is a species of cool, moist forest canopies above 1,400 m (4,600 ft) altitude, although it occurs locally as low as 700 m (2,300 ft). It will use mountain fynbos, second growth, and clearings, and feed on agricultural land when not persecuted.
- 迁徙
- Resident species
行为
The African olive pigeon builds a large stick nest up to 15 m (49 ft) high in a tree and lays one (rarely two) white eggs. The eggs are incubated for 17–20 days to hatching, and the chicks fledge in another 20 days.<p>The male has a display consisting of deep bows, and a display flight which consists of a climb, wing clapping, and slow glide down.<p>The African olive pigeon feeds on fruit and berries, mainly picked in the canopy, but it will also descend for fallen fruit and prey on insects and caterpillars. In the south of its range, it favours the fruit of a highly invasive plant, the bugweed, Solanum mauritianum. Birds fly considerable distances from their roosts to feeding areas, and young or nonbreeding birds form flocks.<p>Geophagy, which is the act of Earth eating, has been observed in this species. The African olive pigeon has been found to eat clay soil of basic pH and high sodium content. Based on current studies, this is for the purpose of supplementing their diet with minerals and as a pH buffer due to their acidic diet.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
African River Martin
Pseudochelidon eurystomina
Enigmatic and distinctive, this compact all-dark martin has striking red eyes and a bright orange-red bill. Juvenile is duller. In lethargic flight it appears bulky-headed, short-tailed, and triangular-winged. Small to large groups forage high over forested rivers, swamps, and coastal scrub. Birds migrate between two breeding areas, one in coastal central Africa from Gabon to northern Angola (August to December), and another farther inland, centered on the Congo River in west-central Democratic Republic of Congo (January to May), but their habits remain poorly understood. Calls include a scratchy chattering “skeer-skeer”; large flocks can become cacophonous.
Bearded Wood-Partridge
Dendrortyx barbatus
Very elusive, chickenlike bird of humid evergreen forest in foothills and highlands; scarce and very local in eastern Mexico where it is endemic. Usually in pairs or small groups on the forest floor. May be seen beside quiet trails and roads early and late in the day; runs away quickly and rarely flies. Note the blue-gray face and throat, red bill and eyering, and rusty breast. Loud rollicking songs are given mainly early and late in the day and most often reveal its presence.
Rufous-tailed Palm-Thrush
Cichladusa ruficauda
Rather plain thrush with a rufous tail, brown back, buffy throat, and red eye. Found in woodland and thickets, usually in areas with palms. The pretty song is a variable mix of whistles and scratchy notes, and sometimes incorporates mimicry of other bird species. Somewhat similar to Familiar Chat, but easily separated by its larger size, red eyes, and lack of a black “T” pattern on the tail.
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