Nominated as one of the world's top 100 "worst invaders".

In the late 19th century, weasels were introduced into New Zealand to control rabbits, where they have had a devastating effect on native bird populations. Download the free guide to find out more.

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The weasel has large anal scent glands measuring 8.5 mm × 5 mm (0.33 in × 0.20 in) in males and smaller in females. Scent glands are also present on the cheeks, belly and flanks.

Interesting Wiki facts

It's all in the family

Combined phylogenetic analyses indicate the stoat's closest living relative is the mountain weasel (Mustela altaica), though it is also closely related to the least weasel (Mustela nivalis) and long-tailed weasel (Mustela frenata). Its next closest relatives are the New World Colombian weasel (Mustela felipei) and the Amazon weasel (Mustela africana).

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