Japanese Weasel vs Mountain Stream Siredon

Mustela itatsi compared with Ambystoma altamirani

Key Differences

• Japanese Weasel is Near Threatened while Mountain Stream Siredon is Endangered.

Taxonomic Classification

Rank	Japanese Weasel	Mountain Stream Siredon
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Amphibia (Amphibians)
Order	Carnivora (Carnivorans)	Caudata (Caudata)
Family	Mustelidae (Weasels & Otters)	Ambystomatidae
Genus	Mustela	Ambystoma
Species	Mustela itatsi	Ambystoma altamirani

Evolutionary Relationship

Japanese Weasel and Mountain Stream Siredon share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Japanese Weasel

NT — Near Threatened

Mountain Stream Siredon

EN — Endangered

Physical Characteristics

Attribute	Japanese Weasel	Mountain Stream Siredon
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.

Mountain Stream Siredon

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Range

Found in Mexico. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.