Giant Otter vs Japanese Weasel

Pteronura brasiliensis compared with Mustela itatsi

Key Differences

• Giant Otter is Endangered while Japanese Weasel is Near Threatened.

Taxonomic Classification

Rank	Giant Otter	Japanese Weasel
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order same	Carnivora (Carnivorans)	Carnivora (Carnivorans)
Family same	Mustelidae (Weasels & Otters)	Mustelidae (Weasels & Otters)
Genus	Pteronura	Mustela
Species	Pteronura brasiliensis	Mustela itatsi

Evolutionary Relationship

Giant Otter and Japanese Weasel share a common ancestor at the Family level: Mustelidae. (Weasels & Otters)

Conservation Status

Giant Otter

EN — Endangered

Japanese Weasel

NT — Near Threatened

Physical Characteristics

Attribute	Giant Otter	Japanese Weasel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Giant Otter

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Venezuela. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its 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.