American Elm vs Brown Rat

Ulmus americana compared with Rattus norvegicus

Key Differences

• American Elm is Endangered while Brown Rat is Least Concern.

Taxonomic Classification

Rank	American Elm	Brown Rat
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Magnoliopsida (Dicots)	Mammalia (Mammals)
Order	Rosales (Roses & Allies)	Rodentia (Rodents)
Family	Ulmaceae	Muridae (Mice & Rats)
Genus	Ulmus	Rattus
Species	Ulmus americana	Rattus norvegicus

Conservation Status

American Elm

EN — Endangered

Brown Rat

LC — Least Concern

Physical Characteristics

Attribute	American Elm	Brown Rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

American Elm

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Distributed across Canada, Taiwan, and United States. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its 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).

American Elm

The American Elm (Ulmus americana) is a species in the genus Ulmus. It is currently classified as Endangered on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

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 3 countries:

🇨🇦 Canada 🇹🇼 Taiwan 🇺🇸 United States