Western Banded Snake-Eagle
Circaetus cinerascens
Chunky, dark brown raptor with barred underparts. Shows a single broad white band through the tail which is conspicuous in flight. Found in and around forest and thick woodland, often near water. Sits for long periods and doesn’t often soar. Generally scarce and uncommon across its range. Call is a weird, strangled “whaaat-hooooa.” Very similar to Fasciated Snake-Eagle, but doesn’t overlap in range. Somewhat similar to African Cuckoo-Hawk, but larger and chunkier, with a dark brown rather than gray head.
分类信息
- 学名
- Circaetus cinerascens
- 命名信息
- Müller, JW, 1851
- 目
- Accipitriformes
- 科
- Accipitridae
- 属
- Circaetus
分布与栖息地
Western banded snake eagles live in woodlands, mainly along rivers, but they avoid dense forests.
- 迁徙
- Resident species
行为
Western banded snake eagles mainly hunt snakes, but also other small vertebrates, ambushing from a perch. They drop from the perch to trunk, foliage or ground. They are solitary birds, and very secretive. Due to their sedentary lifestyle, they are often detected only by their calls.<p>The western banded snake eagle sometimes rises to soar, while it calls above the canon. They utter a loud, high-pitched 'kok-kok-kok-kok-kok'.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Rufous-rumped Foliage-gleaner
Neophilydor erythrocercum
A medium-sized bird, brownish above and pale buff below, with a bright rufous rump and tail and a distinctive buffy line behind the eye. Found in tall rainforest, where it occurs mainly in the midstory and canopy, but occasionally in the understory. Will follow mixed species flocks at all levels. Feeds on insects and forages actively, often investigating dead leaf clusters and other accumulations of detritus. Song is a short, weak series of squeaking notes that fades away; call is a hard doubled note. Most similar to Rufous-tailed Foliage-gleaner but somewhat larger and more likely to occur at lower levels in the forest; both tail and rump are rufous in Rufous-rumped.
White-tufted Grebe
Rollandia rolland
Widespread and often fairly common small dark grebe of lakes, ponds, wetlands; also river mouths and coastal waters, mainly in winter. Like all grebes dives well and can stay underwater for a long time. No similar species in range. Handsome breeding birds have a bold white “fan” on the sides of the head. Immature and nonbreeding birds have a dark cap and a streaked whitish face. Falkland population is larger and blacker, and is likely a different species.
Tundra Bean-Goose
Anser serrirostris
Rather large, dark gray-brown goose with typically small orange patch on bill, and orange legs. In flight lacks contrasting pale forewing areas of Pink-footed Goose and Graylag Goose. Not always safely told in the field from Taiga Bean Goose, but Tundra averages a shorter and thicker bill, vs. the longer, more sloping bill of Taiga. Breeds on tundra and winters in farmland and wetlands, where it associates readily with other geese.
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