least weasel vs Long-tailed Ground Squirrel

Mustela nivalis compared with Urocitellus undulatus

Key Differences

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

Taxonomic Classification

Rank	least weasel	Long-tailed Ground Squirrel
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Carnivora (Carnivorans)	Rodentia (Rodents)
Family	Mustelidae (Weasels & Otters)	Sciuridae (Squirrels)
Genus	Mustela	Urocitellus
Species	Mustela nivalis	Urocitellus undulatus

Evolutionary Relationship

least weasel and Long-tailed Ground Squirrel share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

least weasel

NT — Near Threatened

Long-tailed Ground Squirrel

LC — Least Concern

Physical Characteristics

Attribute	least weasel	Long-tailed Ground Squirrel
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 Ground Squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

least weasel

least weasel (Mustela nivalis) is classified as Near Threatened (NT) on the IUCN Red List. Close to qualifying as threatened, with populations that may become vulnerable without conservation action.