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The present knowledge of the range of small mammal (field mice Apodemus agrarius (Pallas, 1771) and bank vole Clethrionomys glareolus (Schreber, 1780)) movements is discussed and data concerning long distance movements obtained by the authors are presented. Small mammals appeared to be much more mobile than it is commonly belived. Spatial distribution of movements is not random and some routes of movements can be recognized. Such routes are covered mainly by ruderal vegetation and dense bushes. Considerable mobility of small mammals found in the presented studies encourages to think over the present views on organization and regulation of population.