Blue Ash vs Brown Rat

Fraxinus quadrangulata compared with Rattus norvegicus

Key Differences

Blue Ash is Critically Endangered while Brown Rat is Least Concern.

Taxonomic Classification

Rank	Blue Ash	Brown Rat
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Magnoliopsida (Dicots)	Mammalia (Mammals)
Order	Lamiales (Lamiales)	Rodentia (Rodents)
Family	Oleaceae	Muridae (Mice & Rats)
Genus	Fraxinus	Rattus
Species	Fraxinus quadrangulata	Rattus norvegicus

Conservation Status

Blue Ash

CR — Critically Endangered

Brown Rat

LC — Least Concern

Physical Characteristics

Attribute	Blue Ash	Brown Rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blue Ash

Habitat

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

Range

Found in Canada. Currently classified as Critically 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).

Blue Ash

The Blue Ash (Fraxinus quadrangulata) is a species in the genus Fraxinus. It is currently classified as Critically 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.