African Penguin vs Southern Cassowary
Spheniscus demersus compared with Casuarius casuarius
Side-by-Side Comparison
| Attribute | African Penguin | Southern Cassowary |
|---|---|---|
| Scientific Name | Spheniscus demersus | Casuarius casuarius |
| Order | Sphenisciformes | Casuariiformes |
| Family | Spheniscidae | Casuariidae |
| Conservation Status | Endangered | Least Concern |
| Length | 60.0 cm (23.6 in) | 155.0 cm (61.0 in) |
| Wingspan | 42.0 cm (16.5 in) | 60.2 cm (23.7 in) |
| Weight | 3100.0 g (109.35 oz) | 58000.0 g (2045.89 oz) |
| Diet | Small schooling fish, especially sardines and anchovies. Forages within 40 km of the colony, diving … | Primarily fallen fruit from the rainforest floor, also fungi, invertebrates, and small vertebrates. A critical … |
| Clutch Size | 2 | 3-8 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
African Penguin
Rocky coastlines and offshore islands of southern Africa. Nests in burrows, under boulders, or in surface scrapes.
Southern Cassowary
Tropical rainforests, mangroves, and adjacent habitat in New Guinea and northeastern Australia.
Song & Call Comparison
African Penguin
A loud, donkey-like braying 'waaah-waaah' — hence its nickname 'jackass penguin'. Also gives softer grunts and contact calls at the colony. Highly vocal on breeding beaches.
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
African Penguin
Coastal southwestern Africa from Namibia to Port Elizabeth, South Africa. The only penguin species breeding in Africa.
Southern Cassowary
New Guinea, nearby islands, and northeastern Queensland, Australia.
Conservation Status
African Penguin
Southern Cassowary
How to Tell Them Apart
African Penguin
Black upperparts and white underparts with a distinctive black horseshoe-shaped band across the breast. Pink patches of bare skin above the eyes help with thermoregulation.
Sturdy, pointed, black bill with a grey band near the tip
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
African Penguin
The African penguin is the only penguin species native to the African continent, also called the jackass penguin for its donkey-like braying call. Their population has plummeted over 95% since pre-industrial times due to egg collection, oil spills, and competition with commercial fisheries for sardine and anchovy stocks.
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.