Japanese Weasel vs Swan-feather Dwarf

Mustela itatsi compared with Elachista argentella

Key Differences

• Japanese Weasel is Near Threatened while Swan-feather Dwarf is Endangered.

Taxonomic Classification

Rank	Japanese Weasel	Swan-feather Dwarf
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)	Elachistidae
Genus	Mustela	Elachista
Species	Mustela itatsi	Elachista argentella

Evolutionary Relationship

Japanese Weasel and Swan-feather Dwarf share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Japanese Weasel

NT — Near Threatened

Swan-feather Dwarf

EN — Endangered

Physical Characteristics

Attribute	Japanese Weasel	Swan-feather Dwarf
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.

Swan-feather Dwarf

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.