Great Curassow

Crax rubra

Very large game bird of tropical forest, eliminated from most areas by hunting. Rarely found except in protected parks or very remote areas. Usually seen on the forest floor, singly or in small groups, but also feeds in trees. Males often sing from high in canopy: song is a very low-pitched, almost subliminal, booming sound. Not likely to be confused if seen well. Both sexes have distinctive curly crest. Female plumage is variable: some have bold barring, others have darker and mostly unbarred plumage.

识别特征

At 78–100 cm (31–39 in) in length and 3.1–4.8 kg (6.8–10.6 lb) in weight, this is a very large cracid. Females are somewhat smaller than males. It is the most massive and heavy species in the family but its length is matched by a few other cracids. Three other species of curassow (the northern helmeted, the southern helmeted, and the black are all around the same average length as the great curassow. In this species, standard measurements are as follows: the wing chord is 36 to 42.4 cm (14.2 to 16.7 in), the tail is 29 to 38 cm (11 to 15 in) and the tarsus is 9.4 to 12 cm (3.7 to 4.7 in). They have the largest mean standard measurements in the family, other than tail length.<p>The male is black with a curly crest, a white belly, and a yellow knob on its bill. There are three morphs of female great curassows: barred morph females with barred neck, mantle, wings and tail; rufous morph with an overall reddish brown plumage and a barred tail; and dark morph female with a blackish neck, mantle and tail (the tail often faintly vermiculated), and some barring to the wings. In most regions only one or two morphs occur, and females showing a level of intermediacy between these morphs are known (e.g. resembling rufous morph, but with black neck and faint vermiculations to the wings).<p>This species has a similar voice to several other curassows, its call consisting of a "peculiar" lingering whistle.

分类信息

Genus: Crax; Family: Cracidae; Order: Galliformes.

学名
Crax rubra
命名信息
Linnaeus, 1758
Galliformes
Cracidae
Crax

分布与栖息地

迁徙
Resident species

行为

Migration pattern: Resident species.

保护状况

Population trend: declining.

种群趋势
declining

照片

分布

鸟叫声

其他鸟类

Blue-masked Leafbird

Blue-masked Leafbird

Chloropsis venusta

The smallest and most unique-looking of the leafbirds. Stout-bodied, with a relatively long, faintly curved bill. Both sexes have a blue face and yellowish-green belly; males also have an orangish chest and purplish throat. Endemic to Sumatran foothill forests, where it is typically encountered in pairs up in the canopy. Songs include a high-pitched jumble of notes and a repetitive squeaky “tsi’wee, tsi’wee”; calls include a dry “chit” and a sputtering rattle.

Variable Hawk

Variable Hawk

Geranoaetus polyosoma

Common raptor in open spaces in the high Andes and southern South America. Large, relatively broad-winged, and short-tailed raptor. As the name suggests, plumage is quite variable. Adults range from clean white to dark gray and rufous below with a gray or rufous back. Always look for the white tail with a black band near the tip. Juveniles are more confusing, usually dark brown above and buffy below with a variable amount of dark streaking below. Juveniles can also be all dark brown (but this morph is rare). Compare with Black-chested Buzzard-Eagle, which is larger and broader-winged, with young birds usually darker than most Variable Hawks. Occurs from sea level up to over 4,500 m in the Andes, typically in open agricultural land, desert, or paramo, but also ranging over wooded areas.

Semicollared Puffbird

Semicollared Puffbird

Malacoptila semicincta

Chunky, large-headed bird of rainforest understory. Brown with extensive white streaking, and a band of reddish brown across the back of the neck. Usually sits motionless in the understory, sometimes moving with mixed species flocks with birds like ant-tanagers and antwrens, or at army ant swarms. Rarely gives its song, a high-pitched trill, but more frequently gives a weak whistled “weew” that sounds like a soft Tawny-crowned Greenlet and often is overlooked.

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