Dwarf Cassowary vs Northern Cassowary
Casuarius bennetti 比較対象 Casuarius unappendiculatus
Side-by-Side Comparison
| 属性 | Dwarf Cassowary | Northern Cassowary |
|---|---|---|
| 学名 | Casuarius bennetti | Casuarius unappendiculatus |
| 目 | Casuariiformes | Casuariiformes |
| 科 | Casuariidae | Casuariidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 43.4 cm (17.1 in) | 52.9 cm (20.8 in) |
| 体重 | 26300.0 g (927.71 oz) | 46993.25 g (1657.64 oz) |
| 食性 | Nocturnal omnivore in Stewart Island forests; extracts earthworms and insect larvae from peaty soils; takes … | Eats seeds, fruits, leaves, and insects across South American grasslands; forages on the ground in … |
| 一腹卵数 | 3-5 | 3-5 |
| Population Trend | — | — |
Habitat Comparison
Dwarf Cassowary
Dense montane rainforest and cloud forest at 600–3,300 m on New Guinea. Forages on the forest floor among root tangles and dense understorey. Avoids lowland and heavily disturbed forest.
Northern Cassowary
Lowland and foothill rainforest, swamp forest edges, and secondary growth up to 600 m in northern and western New Guinea. Forages along forest streams and near fruiting trees. Avoids heavily disturbed areas.
Song & Call Comparison
Dwarf Cassowary
Produces very deep, low-frequency booming calls similar to Southern Cassowary, though less studied. Also gives hissing sounds when threatened. Mostly silent in dense forest.
Northern Cassowary
Deep, resonant booming calls and guttural rumbles from males during breeding season. Hissing threat displays when approached. Less studied than Southern Cassowary but similar pattern.
Geographic Range & Migration
Dwarf Cassowary
Restricted to Haast district on New Zealand's South Island. Rarest kiwi; non-migratory and sedentary in lowland rainforest.
Northern Cassowary
Widespread in South American forests and grasslands from Venezuela south to Argentina. Largely sedentary; some local seasonal movements.
保全状況
Dwarf Cassowary
Northern Cassowary
How to Tell Them Apart
Dwarf Cassowary
Glossy blue-black body feathers. Bare neck skin blue with red patches at rear; smaller casque than other cassowaries. Reduced wattles. Chicks streaked brown and cream for camouflage.
Northern Cassowary
Body covered in coarse, glossy black feathers. Bare neck and head skin vivid blue and red. Single-wattled with a prominent yellow-orange casque. Bare red skin on nape. Sexes similar in …
About These Birds
Dwarf Cassowary
最小のヒクイドリ（体長約1m）。低い頭蓋冠と2本の赤いひだを持ち、密な山地雨林に生息する。
Northern Cassowary
大型の飛べない鳥で、高い橙黄色の頭蓋冠・青赤の首・1本の垂れ下がったひだを持つ。ニューギニア低地に生息する。