Black-bellied Sandgrouse
Pterocles orientalis
Subtly beautiful shuffling pigeonlike bird with a small head, striking black belly, and pale breast that contrasts with white underwings and black wingtips. Tail is relatively short. Males have a gray head and neck and an orangey throat while females are densely spotted all over. Both sexes have a broad creamy breast band bordered by an eye-catching black stripe. Call is a low, bubbling trill. Most often seen in the mornings when visiting water sources, sometimes in huge flocks, in deserts and semi-deserts with low vegetation.
识别特征
The black-bellied sandgrouse is 33–39 cm (13–15 in) long and weighs 300–615 g (10.6–21.7 oz), it is likely the largest species in the sandgrouse family. The male has a grey head, neck, and breast. The underparts are black and the upperparts are golden-brown with darker markings. There is a thin black border around the lower breast and a chestnut throat patch. This sandgrouse has a small, pigeon-like head and neck, but a stocky compact body. It has long pointed wings and a fast direct flight. The white underwings and black belly make this species easy to identify while in flight. Flocks fly to watering holes at dawn.<p>The female has browner, more finely marked upper parts, including the head and the breast. The underparts and breast band are identical to the male. The eastern race is paler and heavier than orientalis. Males have yellower upperparts and greyer underparts than the western form. Females are whiter below, but often inseparable. The call is a soft chowrrr rrrr-rrrr.
分类信息
The black-bellied sandgrouse was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae. He placed it with all the other grouse-like birds in the genus Tetra and coined the binomial name Tetra orientalis. The black-bellied sandgrouse is now placed with 13 other species in the genus Pterocles that was introduced in 1815 by the Dutch zoologist Coenraad Jacob Temminck. The genus name combines the Ancient Greek pteron meaning "wing" with -klēs meaning "notable" or "splendid".<p>Two subspecies are recognised:
- 学名
- Pterocles orientalis
- 命名信息
- (Linnaeus, 1758)
- 目
- Pterocliformes
- 科
- Pteroclidae
- 属
- Pterocles
分布与栖息地
This gregarious species breeds on dry open plains and similar habitats, but unlike the pin-tailed sandgrouse, it avoids areas completely lacking in vegetation. Its nest is a ground scrape into which three greenish eggs with cryptic markings are laid. Both sexes incubate, but only the male brings water.
- 迁徙
- Complete migrants
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Yellow-footed Gull
Larus livens
Large, dark-backed, and stout-billed gull. Adult has dark slaty gray back like Western Gull, but note the rich yellow legs. Immature plumages look much like Western Gull and other large gulls; overall brown in first year with pinkish legs, developing gray back and yellow legs in second year. Restricted range around the Gulf of California in Mexico; some disperse north to the Salton Sea in California. Favors beaches, rocky and muddy intertidal habitats, and fishing harbors.
Gray-streaked Flycatcher
Muscicapa griseisticta
Small and streaky flycatcher, with longer-winged appearance than Asian Brown and Dark-sided Flycatchers. Breeds in mixed and deciduous forest in lowlands and hilly regions. Dark brown above, white below, with distinct pale eyering and long, dark streaks below. Streaking can resemble the patterning of some Dark-sided Flycatchers but is more distinct, less smudgy-looking. Asian Brown Flycatcher shares the same general color scheme but is paler brown and lacks streaking.
Cuban Trogon
Priotelus temnurus
A splendid medium-sized inhabitant of woodlands; often found in pairs. Its iridescent blue-green back, smooth gray chest, and brilliant red belly easily distinguish it from all other species in range. Usually sits motionless near the middle level of the forest, but when feeding (typically on flowers and fruit) hovers conspicuously. Often found by its loud calls, which are somewhat varied. One common call is a “cu-cu-cu-cu-cu-cu,” often accelerating; another is a resonant quavering “cu-u-low,” given several times in succession.
开始您的观鸟之旅
在户外识别鸟类，并在下一次观察时随手查阅鸟类图鉴。