Least weasel

Scientific name: Mustela nivalis

How weight is recorded: Whole weight

Field notes

Appearance

Extremely slender body with a long tail, uniform russet-brown upper coat and white underparts; females noticeably smaller than males. Head is small and elongated with dark eyes and rounded ears.

Size and weight

Males 20–26 cm body length, 35–70 g; females 17–20 cm, 20–35 g. Northern populations typically larger than southern.

Habitat

Least weasels inhabit open grasslands, meadows, cultivated fields, and moorland from lowland to alpine zones. They prefer areas with dense ground cover and rodent populations, avoiding dense forest but tolerating scrubland edges and rocky terrain.

Distribution

Circumpolar distribution across Eurasia and North America; occurs from lowland farmland to tundra and alpine meadows, absent from dense forests and wet marshes.

Diet

Primarily small rodents (voles, mice) year-round; will also take shrews, insects, and occasionally ground-nesting birds and eggs.

Behaviour

Highly active both day and night with short bursts of hunting separated by rest periods. Solitary and territorial; moves rapidly along ground and through vegetation, frequently poking into burrows and dense cover.

Hunting tips

Look for small paired tracks in soft ground and sparse scat near rodent burrows and field edges. Work slowly through grassland and meadow margins during dawn or dusk, pausing to observe movement in grass. Approach from downwind along hedgerows and field boundaries where cover is dense; watch for sudden darting movement as weasels hunt below the vegetation line.

Whole weight

This species is logged by whole weight — the animal weighed entire, as taken.

Where it is hunted

Listed as huntable in 2 countries in Huntify.

Names in other languages

These field notes are general species knowledge, not legal advice. Always check the current seasons, quotas and firearm rules where you hunt.