Japanese Weasel vs Nut-Tree Pigmy

Mustela itatsi compared with Stigmella microtheriella

Key Differences

• Japanese Weasel is Near Threatened while Nut-Tree Pigmy is Least Concern.

Taxonomic Classification

Rank	Japanese Weasel	Nut-Tree Pigmy
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Insecta (Insects)
Order	Carnivora (Carnivorans)	Lepidoptera (Butterflies & Moths)
Family	Mustelidae (Weasels & Otters)	Nepticulidae
Genus	Mustela	Stigmella
Species	Mustela itatsi	Stigmella microtheriella

Evolutionary Relationship

Japanese Weasel and Nut-Tree Pigmy share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Japanese Weasel

NT — Near Threatened

Nut-Tree Pigmy

LC — Least Concern

Physical Characteristics

Attribute	Japanese Weasel	Nut-Tree Pigmy
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.

Nut-Tree Pigmy

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.