ABSTRACT

On the basis of available literature data an attempt was made to estimate size and density of the Forest Dormouse population in the Polish part of the Białowieża Forest, covering ca 58 000 ha. The estimate of the population size falls between 7750 and 40 170 individuals. The number of 18 856 individuals is probably the closest to the real state. Considering the above calculations as reliable, the density ofpopulation in this area is ca 3.3 indiv./10 ha (the extreme results are: 1.3 and 6.9 indiv./10 ha). Such densities correspond to those given by other authors for other areas.