Elm Leech vs Polynesian rat

Hypsizygus ulmarius compared with Rattus exulans

Key Differences

Elm Leech is Critically Endangered while Polynesian rat is Least Concern.

Taxonomic Classification

Rank	Elm Leech	Polynesian rat
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Chordata (Chordates)
Class	Agaricomycetes (Mushrooms)	Mammalia (Mammals)
Order	Agaricales (Gilled Mushrooms)	Rodentia (Rodents)
Family	Lyophyllaceae	Muridae (Mice & Rats)
Genus	Hypsizygus	Rattus
Species	Hypsizygus ulmarius	Rattus exulans

Conservation Status

Elm Leech

CR — Critically Endangered

Polynesian rat

LC — Least Concern

Physical Characteristics

Attribute	Elm Leech	Polynesian rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Elm Leech

Habitat

Inhabits tropical and subtropical moist broadleaf forests within the Indomalayan biogeographic realm.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and North America (United States). Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Polynesian rat

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical coniferous forests, among 4 distinct biome types spanning the Australasia and Indomalayan realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (6 countries), Europe (United Kingdom), North America (United States), Oceania and the Pacific (11 countries), and South America (Chile).