Dwarf Cassowary vs Southern Cassowary
Casuarius bennetti 比較対象 Casuarius casuarius
Side-by-Side Comparison
| 属性 | Dwarf Cassowary | Southern Cassowary |
|---|---|---|
| 学名 | Casuarius bennetti | Casuarius casuarius |
| 目 | Casuariiformes | Casuariiformes |
| 科 | Casuariidae | Casuariidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | 155.0 cm (61.0 in) |
| 翼開長 | 43.4 cm (17.1 in) | 60.2 cm (23.7 in) |
| 体重 | 26300.0 g (927.71 oz) | 58000.0 g (2045.89 oz) |
| 食性 | Nocturnal omnivore in Stewart Island forests; extracts earthworms and insect larvae from peaty soils; takes … | Primarily fallen fruit from the rainforest floor, also fungi, invertebrates, and small vertebrates. A critical … |
| 一腹卵数 | 3-5 | 3-8 |
| Population Trend | — | — |
Size Comparison
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.
Southern Cassowary
Tropical rainforests, mangroves, and adjacent habitat in New Guinea and northeastern Australia.
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.
Southern Cassowary
Produces very deep, booming rumbles and low-frequency calls below 20 Hz (infrasound), felt more than heard. Also gives loud bellowing grunts audible up to 1 km away.
Geographic Range & Migration
Dwarf Cassowary
Restricted to Haast district on New Zealand's South Island. Rarest kiwi; non-migratory and sedentary in lowland rainforest.
Southern Cassowary
New Guinea, nearby islands, and northeastern Queensland, Australia.
保全状況
Dwarf Cassowary
Southern 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.
Southern Cassowary
Glossy black hair-like plumage. Brilliant blue and red bare skin on the head and neck. A large bony casque crowns the head. Vestigial wings with no flight feathers.
Long, laterally compressed, dark grey bill
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。
Southern Cassowary
The southern cassowary is often called the most dangerous bird in the world due to its powerful legs and dagger-like inner claw that can reach 12 cm in length. Despite this reputation, cassowaries are vital rainforest keystone species, dispersing seeds of plants that no other animal can. The purpose of their distinctive casque remains debated.