Common Ostrich vs Emperor Penguin

Struthio camelus compared with Aptenodytes forsteri

Key Differences

• Common Ostrich is Least Concern while Emperor Penguin is Near Threatened.
• Common Ostrich is omnivore while Emperor Penguin is carnivore.
• Common Ostrich is 2.5x heavier than Emperor Penguin.
• Common Ostrich lives longer (45 years vs 20 years).

Taxonomic Classification

Rank	Common Ostrich	Emperor Penguin
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (Birds)	Aves (Birds)
Order	Struthioniformes (Struthioniformes)	Sphenisciformes (Penguins)
Family	Struthionidae	Spheniscidae (Penguins)
Genus	Struthio	Aptenodytes (Great Penguins)
Species	Struthio camelus	Aptenodytes forsteri

Evolutionary Relationship

Common Ostrich and Emperor Penguin share a common ancestor at the Class level: Aves. (Birds)

Conservation Status

Common Ostrich

LC — Least Concern

Trend: Stable →

Emperor Penguin

NT — Near Threatened

Population: ~595.0K

Trend: Stable →

Physical Characteristics

Attribute	Common Ostrich	Emperor Penguin
Diet	Omnivore	Carnivore
Average Lifespan	45 years	20 years
Average Length	2.1 m	1.1 m
Average Weight	100.0 kg	40.0 kg

Habitat & Geographic Range

Common Ostrich

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, temperate broadleaf and mixed forests, and temperate coniferous forests, among 4 distinct biome types within the Indomalayan biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (4 countries), Europe (5 countries), and South America (Colombia, Ecuador, Peru).

Emperor Penguin

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Common Ostrich

The world's largest and heaviest living bird, common ostriches stand up to 2.8 meters tall and weigh 156 kg, inhabiting savannas and semi-arid plains of Africa. Flightless, they compensate with powerful long legs capable of delivering lethal kicks and sustaining running speeds of 70 km/h — the fastest of any bird. Their large eyes are the biggest of any land vertebrate. Ostriches lay the largest eggs of any living bird.

Emperor Penguin

The world's largest penguin, emperor penguins stand up to 1.2 meters and weigh 45 kg, inhabiting the Antarctic continent in some of the most extreme conditions on Earth. They breed in midwinter darkness at temperatures below -60°C, with males incubating single eggs on their feet under a brood pouch for 65 days while females are at sea. Their huddling behavior — cycling individuals through the warm center of thousands-strong groups — is a masterclass in cooperative survival.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway