Brown Rat vs Louse

Rattus norvegicus compared with Bovicola ovis

Key Differences

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

Taxonomic Classification

Rank	Brown Rat	Louse
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Insecta (Insects)
Order	Rodentia (Rodents)	Psocodea (Psocodea)
Family	Muridae (Mice & Rats)	Trichodectidae
Genus	Rattus	Bovicola
Species	Rattus norvegicus	Bovicola ovis

Evolutionary Relationship

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

Conservation Status

Brown Rat

LC — Least Concern

Louse

NE — Not Evaluated

Physical Characteristics

Attribute	Brown Rat	Louse
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).

Louse

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (16 countries) and North America (United States).

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 17 countries:

🇧🇪 Belgium 🇧🇬 Bulgaria 🇨🇿 Czech Republic 🇩🇰 Denmark 🇫🇮 Finland 🇫🇷 France 🇭🇺 Hungary 🇮🇹 Italy 🇱🇹 Lithuania 🇳🇱 Netherlands 🇳🇴 Norway 🇵🇱 Poland 🇷🇴 Romania 🇪🇸 Spain 🇸🇪 Sweden 🇬🇧 United Kingdom 🇺🇸 United States