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Uncommon but periodically found along braided rivers.
Similar in colour and general appearance to stoats, weasels are much less common and have distinctly shorter tails. Like stoats, there is a clear demarkation in colour from the reddish brown fur on their backs and their yellow-white belly fur. Male weasels are 200mm long and weigh 130g. Female are 170-240mm and weight 60g. In alpine areas some stoats develop a pure white winter fur, though this is rare in New Zealand. They are known to be predated by cats, an aspect of the complex predator guild not well-understood on braided rivers.