Horned Screamer vs Southern Screamer
Anhima cornuta 对比 Chauna torquata
Side-by-Side Comparison
| 属性 | Horned Screamer | Southern Screamer |
|---|---|---|
| 学名 | Anhima cornuta | Chauna torquata |
| 目 | Anseriformes | Anseriformes |
| 科 | Anhimidae | Anhimidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 110.6 cm (43.5 in) | 103.4 cm (40.7 in) |
| 体重 | 3450.0 g (121.70 oz) | 3550.0 g (125.22 oz) |
| 食性 | Grazes arctic grasses and sedges in summer; winters on coastal marshes and agricultural fields; eats … | Grazes grasses, sedges, and aquatic vegetation; forms large flocks; diet shifts between wetland plants and … |
| 产卵数 | 2-7 | 2-7 |
| Population Trend | — | — |
Habitat Comparison
Horned Screamer
Tropical freshwater marshes, seasonally flooded savannas, lake margins, and forest-edge wetlands from Colombia, Venezuela, and the Guianas south through the Amazon basin to Bolivia and northern Brazil.
Southern Screamer
Freshwater marshes, seasonally flooded grasslands, lake margins, and wet pampas from Bolivia and Brazil south through Paraguay, Uruguay, and Argentina. Tolerates cattle pastures and modified wetlands.
Song & Call Comparison
Horned Screamer
An extremely loud, far-carrying 'SKREEEEEE-ow' call — one of the loudest Neotropical waterbird calls. Pairs duet with overlapping screams audible over 3 km. Highly vocal.
Southern Screamer
An extremely loud, resonant screaming duet 'chakka-chakka'. Pairs coordinate their calls. Flocks on wetlands create a powerful cacophony audible over great distances.
Geographic Range & Migration
Horned Screamer
Ranges across central South America from southeastern Brazil to Bolivia and Argentina. Sedentary in dry Chaco and cerrado.
Southern Screamer
Breeds on sub-Antarctic islands in the southern Indian Ocean; disperses at sea in austral winter. Pelagic outside breeding season.
保护状况
Horned Screamer
Southern Screamer
How to Tell Them Apart
Horned Screamer
Mostly black plumage with white spotting on wings; white belly and flanks. Distinctive white forehead patch. Long, slender whitish horn projecting from crown. Bare red eye-ring. Sexes similar.
Southern Screamer
Gray body plumage; head pale gray with black collar on neck. Bare red facial skin at base of bill. White wing patches visible in flight. Legs red. Belly whitish. Sexes …
About These Birds
Horned Screamer
A large turkey-sized waterbird with black-and-white plumage, a long bony horn protruding from the forehead, and spurs on its wings. Inhabits tropical marshes and forest-edge wetlands across Amazonia. Often perches conspicuously atop tall trees and calls loudly. Feeds on aquatic vegetation.
Southern Screamer
角叫鸭 (Chauna torquata)，体长约85–95厘米。体羽灰黑色，颈部白色，翅膀具角质刺突，腿红色，眼红色。分布于南美洲中部湿地，包括巴西、阿根廷和乌拉圭。叫声极响，以水生植物为食。