Brown Rat vs Isopod

Rattus norvegicus compared with Porcellio dilatatus

Key Differences

• Brown Rat is Least Concern while Isopod is Not Evaluated.

Taxonomic Classification

Rank	Brown Rat	Isopod
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Malacostraca (Crustaceans)
Order	Rodentia (Rodents)	Isopoda (Isopoda)
Family	Muridae (Mice & Rats)	Porcellionidae
Genus	Rattus	Porcellio
Species	Rattus norvegicus	Porcellio dilatatus

Evolutionary Relationship

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

Conservation Status

Brown Rat

LC — Least Concern

Isopod

NE — Not Evaluated

Physical Characteristics

Attribute	Brown Rat	Isopod
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).

Isopod

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Widely distributed across Europe (7 countries), North America (United States), and South America (Brazil).

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 9 countries:

🇧🇪 Belgium 🇧🇷 Brazil 🇨🇿 Czech Republic 🇩🇰 Denmark 🇩🇪 Germany 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden 🇺🇸 United States