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Long-tailed Weasel: Wikis


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Long-tailed Weasel
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Mustelidae
Subfamily: Mustelinae
Genus: Mustela
Species: M. frenata
Binomial name
Mustela frenata
Lichtenstein, 1831
Range map

The Long-tailed Weasel (Mustela frenata) is the most widely distributed mustelid in the New World. Its range extends from southern Canada through most of the United States to Mexico, Central America and the northern parts of South America. It is generally found in open or semi-open habitats near water.

This is a typical weasel with a long slender body, short legs and a bushy tail that is almost as long as the rest of the animal. Adult males measure from 33 to 45 cm (14 to 18 in)(including their tails), and may weigh up to 500g (1 lb); females are typically about 15% smaller. They are gingerish-brown in colour, with yellowish-white belly fur, but in the northern parts of their range they moult to pure white in winter. The tip of the tail is black in all seasons.

Like most weasels, Long-tailed Weasels mainly eat rodents, their slender bodies enabling them to pursue their prey into their burrows. They are most active at night but are sometimes seen during the day. They are highly solitary, and their home ranges do not overlap with another member of the species of the same sex (though each male's home range may include several females' home ranges). Their young are born helpless, but by 56 days are able to catch prey independently.

They are able to climb trees and are also good swimmers.


  1. ^ Reid, F. & Helgen, K. (2008). Mustela frenata. In: IUCN 2008. IUCN Red List of Threatened Species. Downloaded on 21 March 2009. Database entry includes a brief justification of why this species is of least concern

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