least weasel vs Long-tailed Weasel

Mustela nivalis compared with Mustela frenata

Key Differences

• least weasel is Near Threatened while Long-tailed Weasel is Least Concern.

Taxonomic Classification

Rank	least weasel	Long-tailed Weasel
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class same	Mammalia (哺乳動物)	Mammalia (哺乳動物)
Order same	Carnivora (食肉目)	Carnivora (食肉目)
Family same	Mustelidae (Weasels & Otters)	Mustelidae (Weasels & Otters)
Genus same	Mustela	Mustela
Species	Mustela nivalis	Mustela frenata

Evolutionary Relationship

least weasel and Long-tailed Weasel share a common ancestor at the Genus level: Mustela.

Conservation Status

least weasel

NT — Near Threatened

Long-tailed Weasel

LC — Least Concern

Physical Characteristics

Attribute	least weasel	Long-tailed Weasel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

least weasel

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, tundra, and tropical and subtropical moist broadleaf forests, among 4 distinct biome types spanning the Australasia and Oceanian and Palearctic realms.

Range

Widely distributed across Africa (Sao Tome and Principe), Asia (Cyprus), Europe (11 countries), and Oceania and the Pacific (New Zealand). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Long-tailed Weasel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, United States, and Venezuela.

least weasel

伶鼬（Mustela nivalis）被IUCN红色名录列为近危（NT）物种。接近受威胁标准，若不采取保护措施，种群可能变得脆弱。