Least weasel

Mustela nivalis

MammalThe least weasel is cla…

Overview

There are fourteen subspecies, of which we have ten pages for.

Taxonomy

Kingdom: Animalia
Phylum: Chordata
Class: Mammal

Habitat

Least weasels inhabit grasslands, farmlands, forests, and tundra across Europe, Asia, and North America. They prefer areas with dense vegetation, such as hedgerows, brush piles, and riverbanks, for cover and hunting. This species adapts well to both rural and urban edges but avoids dense forests.

Diet

Least weasels primarily eat small rodents like voles and mice, which make up the bulk of their diet. They also consume birds, eggs, frogs, and insects, using their agility to stalk and kill prey quickly. Feeding is mostly nocturnal, with weasels hunting actively to meet their high metabolic needs.

Behavior

Least weasels are solitary and territorial animals, marking their ranges with scent and fiercely defending them from intruders. They are primarily nocturnal, exhibiting agile and swift hunting behaviors, often chasing prey into burrows. Despite their small size, they are bold and aggressive when threatened, and they do not hibernate but remain active year-round.

Conservation Status

The least weasel is classified as Least Concern by the IUCN, with a stable global population. Major threats include habitat loss due to agricultural expansion and secondary poisoning from rodenticides.