Search for: [Description = "Eighteen female weasels Mustela nivalis Linnaeus, 1766, in breeding condition were caught in different parts of Poland from 1962 to 1986. All were examined macroscopically. Pregnancies occured from April to September. Lactacing females were caught from May to September. Young would thus leave their nest from May\/June to late October. No signs of reproduction were found in winter."]

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