Hunting success of the weasel Mustela nivalis and escape tactics of forest rodents in Białowieża National Park

Visual observations of five radiotracked male weasels Mustela nivalis Linnaeus, 1766 hunting rodents are reported. The weasels hunted bank voles Clethrionomys glareolus and yellow-necked mice Apodemus flavicollis in the primeval deciduous forests of the Białowieża National Park, Eastern Poland. Densities of rodents were high as a consequence of mast crop in the year preceding the observations. A total of 60 attacks by weasels were observed from October till December 1990.