Brown Rat vs White River Crayfish

Rattus norvegicus compared with Procambarus acutus

Key Differences

• Brown Rat is Least Concern while White River Crayfish is Not Evaluated.

Taxonomic Classification

Rank	Brown Rat	White River Crayfish
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Malacostraca (Crustaceans)
Order	Rodentia (Rodents)	Decapoda (Decapoda)
Family	Muridae (Mice & Rats)	Cambaridae
Genus	Rattus	Procambarus
Species	Rattus norvegicus	Procambarus acutus

Evolutionary Relationship

Brown Rat and White River Crayfish share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Brown Rat

LC — Least Concern

White River Crayfish

NE — Not Evaluated

Physical Characteristics

Attribute	Brown Rat	White River Crayfish
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).

White River Crayfish

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Found across Europe (6 countries).

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 6 countries:

🇧🇪 Belgium 🇫🇷 France 🇳🇱 Netherlands 🇳🇴 Norway 🇸🇪 Sweden 🇬🇧 United Kingdom