Pallid Harrier
Circus macrourus
Males are ghostly gray above with black wingtip wedges. Females are more difficult to separate from other harriers; pay attention to the underwings with their barred primaries and dark secondaries. Juveniles are rufous and similar to Montagu’s, but appear dark rather than pale faced. In flight, a bit bulkier than Montagu’s but much more buoyant than Hen Harrier. Found in steppes, wet grassland, agricultural areas and other open spaces. Sometimes forms flocks outside of the breeding season, occasionally mixing with other harrier species.
识别特征
This is a typical harrier, with long wings held in a shallow V in its low flight. It also resembles other harriers in having distinct male and female plumages. Adults measure 40–48 cm (16–19 in) long with a wingspan of 95–120 cm (37–47 in). Males weigh 315 g (11.1 oz) while the slightly larger females weigh 445 g (15.7 oz). The male is whitish grey above and white below, with narrow black wingtips. It differs from the hen harrier in its smaller size, narrower wings, paler colour, and different wing tip pattern. The female is brown above with white upper tail coverts, hence females and the similar juveniles are often called "ringtails". Her underparts are buff streaked with brown. It is best distinguished from the female hen harrier on structure. It is very similar to the female Montagu's harrier, but has a paler belly and a well defined facial pattern.
分类信息
- 学名
- Circus macrourus
- 命名信息
- (Gmelin, SG, 1770)
- 目
- Accipitriformes
- 科
- Accipitridae
- 属
- Circus
分布与栖息地
- 繁殖区
- PAL : e Europe to c Asia
- 非繁殖区
- AF, OR
- 迁徙
- Complete migrants
行为
Pallid harriers primarily hunt small mammals and birds, surprising them as they drift low over fields and moors. Other food sources include large insects (typically grasshoppers and locusts), lizards and frogs.The nest of this species is on the ground. Three to six, but typically four to five whitish eggs are laid.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Singing Parrot
Geoffroyus heteroclitus
A mostly green medium-sized parrot with a contrasting head, gray in females and yellow in males. Shows a blue underwing in flight. Inhabits lowland forest edge, including coconut plantations, parks, and gardens, up to at least 1750 meters of elevation. Bulkier than Cardinal, White-naped, Yellow-bibbed, and Purple-bellied Lories, with slower wingbeats, and lacks the mostly red color of those species. The similar Eclectus Parrot is larger with a bigger bill, and male is also green but has a red underwing. Singing Parrot’s voice includes a wide variety of harsh cries and a whistling bell-like song.
Red-headed Trogon
Harpactes erythrocephalus
A brightly-colored bird of dense evergreen forests, usually seen perched quietly on a mid-story perch. Varies in coloration throughout its range but always follows the same general color scheme: male has a dark red head and belly, a brown back, and barred black-and-white wings. Female has a more faded-red belly and a brown head. Both sexes, when seen from below, have a sharply contrasting and graduated black-and-white tail pattern. Sluggish and typically stationary and difficult to see; listen for its high-pitched gulping hoots.
Black-breasted Puffbird
Notharchus pectoralis
Rather large puffbird found from central Panama to extreme northwest Ecuador. Striking black-and-white pattern; especially note broad black breast band and isolated white cheek patch. Typically found singly or in pairs; usually perched in the canopy or subcanopy of lowland forest and edge below 1,000 m. Pied Puffbird is smaller with a white eyebrow. White-necked Puffbird is larger with a white forehead and more extensive white on the neck and forehead (lacking a black mustache).
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