Mexican Duck vs African Black Duck
Anas diazi 比較対象 Anas sparsa
Side-by-Side Comparison
| 属性 | Mexican Duck | African Black Duck |
|---|---|---|
| 学名 | Anas diazi | Anas sparsa |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Not Evaluated | Least Concern |
| 体長 | — | — |
| 翼開長 | — | 49.5 cm (19.5 in) |
| 体重 | 1003.75 g (35.41 oz) | 996.8333333333334 g (35.16 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1-13 | 4-9 |
| Population Trend | — | — |
Habitat Comparison
Mexican Duck
Freshwater lakes, marshes, and rivers at 1,000–2,500 m in the highlands of Mexico and the southwestern United States. Uses agricultural ponds and irrigation canals.
African Black Duck
Fast-flowing rocky rivers and streams, mountain gorges, and waterfalls from sea level to 4,000 m across sub-Saharan Africa from Ethiopia and Kenya south to the Cape. Requires clear turbulent water with boulders.
Song & Call Comparison
Mexican Duck
Female gives a Mallard-like, descending quacking series; male utters a soft, nasal grunt. Vocalizations essentially identical to Mallard; found in Mexican interior wetlands and the Rio Grande.
African Black Duck
Produces a harsh, resonant quacking call; alarm is a loud, emphatic quack repeated rapidly. Both sexes call with strong quacking; pairs duet with synchronized calls along African rivers.
保全状況
Mexican Duck
African Black Duck
How to Tell Them Apart
Mexican Duck
Similar to Mottled Duck; mottled brown plumage with pale buff head showing dark crown and eye stripe. Iridescent blue-purple speculum with white borders. Yellow-orange bill. Both sexes similar. SW USA …
African Black Duck
Dark blackish-brown plumage with bold white spots on back and scapulars. Iridescent blue-green speculum with white borders. Head dark with pale spots. Bill and legs dark gray. Sexes similar. Fast-flowing …
About These Birds
Mexican Duck
メキシコガモとも呼ばれるこの種は、メキシコ中央高原および米国南西部の湿地や河川に生息する中型のカモです。褐色の羽毛と緑色の嘴が特徴で、マガモと近縁ですが、独立した種として扱われています。生息地の破壊と狩猟圧力により個体数が減少しており、保全が求められています。
African Black Duck
アフリカンブラックダックはサハラ以南のアフリカの急流河川に生息する特殊なカモです。暗褐色の羽毛と白い斑点が特徴で、水流の速い清澄な渓流を好みます。繁殖期には縄張り意識が強く、ペアで生活します。急流の水生昆虫や甲殻類を主食とします。