Weasel Mustela nivalis Length 25-40cm Active predator of voles and mice. Has a long, sinuous body and recalls a tiny Stoat except for shorter tail of uniform colour, not black-tipped. Adult has orange-brown upperparts and sides, and white underparts, including throat; note the clear demarcation between the two colours. Male is larger than female. Utters high-pitched hisses in alarm. Widespread and fairly common in a range of habitats including woods, hedgerows and scrub; absent from most islands and Ireland.