Brown Rat vs Weedy brome

Rattus norvegicus compared with Bromus alopecuros

Key Differences

• Brown Rat is Least Concern while Weedy brome is Not Evaluated.

Taxonomic Classification

Rank	Brown Rat	Weedy brome
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Mammalia (Mammals)	Liliopsida (Monocots)
Order	Rodentia (Rodents)	Poales (Grasses)
Family	Muridae (Mice & Rats)	Poaceae (Grass Family)
Genus	Rattus	Bromus
Species	Rattus norvegicus	Bromus alopecuros

Conservation Status

Brown Rat

LC — Least Concern

Weedy brome

NE — Not Evaluated

Physical Characteristics

Attribute	Brown Rat	Weedy brome
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

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).

Weedy brome

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Widely distributed across Europe (5 countries), North America (United States), and Oceania and the Pacific (Australia).

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.

Shared Countries

Both species can be found in 7 countries:

🇦🇺 Australia 🇧🇪 Belgium 🇫🇷 France 🇳🇱 Netherlands 🇸🇪 Sweden 🇬🇧 United Kingdom 🇺🇸 United States