Horned Coot
Fulica cornuta
Very large, but rather local coot; rare except at a few lakes in the high Andes set amid barren and rocky surroundings. Often far out on deep-water lakes, where it looks rather uneventful: black overall with a pale yellowish bill. Seen up close, note the bizarre, erectile black “horn” appendage covering the bill base. Juvenile is dark sooty gray with a whitish throat. Builds remarkable nest mounds of stones topped with weeds that look like the tips of huge underwater volcanoes and take months, if not years, to complete.
识别特征
Horned coot males average a little larger than the female. With a total length of 46–62 cm (18–24 in) and a reported body mass from 1.6–2.29 kg (3.5–5.0 lb), it averages slightly smaller than the related giant coot as the second largest coot and the third largest extant species of rail.<p>While most coots have a horny shield on the forehead, the horned coot has three wattles in both sexes. The central wattle is large and may possibly be erectile. The three wattles terminate in tufts of filoplumes. At the base of the beak and below the wattle is a fleshy caruncle which is whitish. The bill is olive yellow, brightening to dull orange towards the base. Unlike the giant coot, the legs of the horned coot are dull greenish.
分类信息
- 学名
- Fulica cornuta
- 命名信息
- Bonaparte, 1853
- 目
- Gruiformes
- 科
- Rallidae
- 属
- Fulica
分布与栖息地
The coot occurs in the altiplano of north-western Argentina, south-western Bolivia, and north-eastern Chile. It is almost entirely restricted to lakes at altitudes of 3000–5200 m.a.s.l., but has occasionally been recorded at lower altitudes.
- 迁徙
- Resident species
保护状况
It is generally a low-density species and the total population has been estimated at 10,000–20,000, with as few as 620 in the Chilean part of its range. Consequently, it is considered to be near threatened by BirdLife International and IUCN.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Red-faced Barbet
Lybius rubrifacies
Chunky, medium-sized black barbet. There is red on the face, and the bottom part of the wing has white edging. Found locally in woodland, cultivated areas, and gallery forest. Usually in pairs or small groups. The call is an unmusical duet of low, rasping calls. Similar to Black-billed Barbet, but not known to overlap in range, and easily separated by lack of red on the throat or white edges to the top part of the wing.
Silvery Wood-Pigeon
Columba argentina
Beautiful grayish-white pigeon with black wing- and tail-tips. Rare, little-known, and extremely localized; now found only on islands off western Sumatra (though may occasionally wander onto the main island), where it forages in lowland and hill forest. Vocalizations poorly understood and seldom heard; documented giving deep, sonorous, rising coos.
Wattled Guan
Aburria aburri
Distinctive guan: all black with cerulean bill, yellowish-orange legs, and thin yellow dewlap. Could be confused with Sickle-winged Guan, which is smaller and has warm brown underparts. Occurs in the subtropical zone of the Andes from Venezuela to Peru, from around 1,200 to 2,200 m. Surprisingly difficult to see as it forages in the middle to upper levels of dense forest; rarely perches in the open. Most often detected by its amazing voice, a strange alien-like call that rises and falls.
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