Japanese Weasel vs Napo Spiny-rat

Mustela itatsi compared with Proechimys quadruplicatus

Key Differences

• Japanese Weasel is Near Threatened while Napo Spiny-rat is Least Concern.

Taxonomic Classification

Rank	Japanese Weasel	Napo Spiny-rat
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order	Carnivora (ネコ目)	Rodentia (ネズミ目)
Family	Mustelidae (Weasels & Otters)	Echimyidae
Genus	Mustela	Proechimys
Species	Mustela itatsi	Proechimys quadruplicatus

Evolutionary Relationship

Japanese Weasel and Napo Spiny-rat share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

Japanese Weasel

NT — Near Threatened

Napo Spiny-rat

LC — Least Concern

Physical Characteristics

Attribute	Japanese Weasel	Napo Spiny-rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Japanese Weasel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

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

Napo Spiny-rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, and Venezuela.