Cave ground-beetle vs Polynesian rat

Trechus jorgensis compared with Rattus exulans

Key Differences

• Cave ground-beetle is Critically Endangered while Polynesian rat is Least Concern.

Taxonomic Classification

Rank	Cave ground-beetle	Polynesian rat
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (artrópodos)	Chordata (cordados)
Class	Insecta (insecto)	Mammalia (mamíferos)
Order	Coleoptera (coleópteros)	Rodentia (Rodents)
Family	Carabidae	Muridae (Mice & Rats)
Genus	Trechus	Rattus
Species	Trechus jorgensis	Rattus exulans

Evolutionary Relationship

Cave ground-beetle and Polynesian rat share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Cave ground-beetle

CR — Critically Endangered

Polynesian rat

LC — Least Concern

Physical Characteristics

Attribute	Cave ground-beetle	Polynesian rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Cave ground-beetle

Habitat

Inhabits temperate broadleaf and mixed forests and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Portugal. 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).

Cave ground-beetle

The Cave ground-beetle (Trechus jorgensis) is a species in the genus Trechus. It is currently classified as Critically Endangered on the IUCN Red List. Inhabits temperate broadleaf and mixed forests and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.