Pacific Spiny-rat vs Polynesian rat

Proechimys decumanus compared with Rattus exulans

Key Differences

• Pacific Spiny-rat is Near Threatened while Polynesian rat is Least Concern.

Taxonomic Classification

Rank	Pacific Spiny-rat	Polynesian rat
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order same	Rodentia (Rodents)	Rodentia (Rodents)
Family	Echimyidae	Muridae (Mice & Rats)
Genus	Proechimys	Rattus
Species	Proechimys decumanus	Rattus exulans

Evolutionary Relationship

Pacific Spiny-rat and Polynesian rat share a common ancestor at the Order level: Rodentia. (Rodents)

Conservation Status

Pacific Spiny-rat

NT — Near Threatened

Polynesian rat

LC — Least Concern

Physical Characteristics

Attribute	Pacific Spiny-rat	Polynesian rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Pacific Spiny-rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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).