Brown Rat vs Common Ostrich

Rattus norvegicus compared with Struthio camelus

Taxonomic Classification

Rank	Brown Rat	Common Ostrich
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Rodentia (Rodents)	Struthioniformes (Struthioniformes)
Family	Muridae (Mice & Rats)	Struthionidae
Genus	Rattus	Struthio
Species	Rattus norvegicus	Struthio camelus

Evolutionary Relationship

Brown Rat and Common Ostrich share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Brown Rat

LC — Least Concern

Common Ostrich

LC — Least Concern

Trend: Stable →

Physical Characteristics

Attribute	Brown Rat	Common Ostrich
Diet	—	Omnivore
Average Lifespan	—	45 years
Average Length	—	2.1 m
Average Weight	—	100.0 kg

Habitat & Geographic Range

Brown Rat

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 10 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (11 countries), Asia (15 countries), Europe (41 countries), North America (16 countries), Oceania and the Pacific (10 countries), and South America (10 countries).

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).

Brown Rat

Brown Rat (Rattus norvegicus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

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.

Shared Countries

Both species can be found in 11 countries:

🇧🇪 Belgium 🇨🇴 Colombia 🇪🇨 Ecuador 🇫🇷 France 🇳🇱 Netherlands 🇳🇴 Norway 🇵🇪 Peru 🇸🇦 Saudi Arabia 🇹🇼 Taiwan 🇦🇪 United Arab Emirates 🇬🇧 United Kingdom