Brown Rat vs Mountain Hemlock

Rattus norvegicus compared with Tsuga mertensiana

Key Differences

• Brown Rat is Least Concern while Mountain Hemlock is Not Evaluated.

Taxonomic Classification

Rank	Brown Rat	Mountain Hemlock
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Coniferophyta (Conifers)
Class	Mammalia (Mammals)	Pinopsida (Conifers)
Order	Rodentia (Rodents)	Pinales (Pines & Allies)
Family	Muridae (Mice & Rats)	Pinaceae (Pine Family)
Genus	Rattus	Tsuga
Species	Rattus norvegicus	Tsuga mertensiana

Conservation Status

Brown Rat

LC — Least Concern

Mountain Hemlock

NE — Not Evaluated

Physical Characteristics

Attribute	Brown Rat	Mountain Hemlock
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).

Mountain Hemlock

Habitat

Typically found in temperate and boreal forests, often at higher elevations.

Range

Distributed across Canada, Denmark, Iceland, Norway, and Sweden.

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 5 countries:

🇨🇦 Canada 🇩🇰 Denmark 🇮🇸 Iceland 🇳🇴 Norway 🇸🇪 Sweden