Weasal in a box close up
© Scott Petrek

Weasel

Mustela nivalis

Statistics
Length17-22cm
Tail3-5cm
Weight55-130g
Lifespan2 years

Weasels may look adorable, but they make light work of eating voles, mice and birds! They are related to otters and stoats, which is obvious thanks to their long slender bodies and short legs.

About

Weasels are the UK’s smallest carnivore. They like to eat voles, mice and small birds. They belong to a group of animals known as mustelids, which means they have a long body and short legs and are related to otters and stoats. They live in lots of different habitats including woodland, grassland, and moorland. Their young are called kits, and they can have up to two litters a year with three to six kits per litter.

How to identify

The weasel has a russet-brown back, and a creamy white throat and belly. It is smaller than the similar stoat, has a shorter tail with no black tip, and has a running gait, with a straight back; stoats bound along, arching their backs as they go.

Did you know?

Weasels are so small and agile that they fit into the burrows of their small rodent prey, enabling them to hunt day or night and in any season; they can even hunt in the snow!