The home range size of 14 adult Pygmy Owls (Glaucidium passerinum), eight males and six females, were examined using radio tracking in Germany. The average home range size of the individuals calculated as 95% fixed kernel home is 150 ha. Pygmy Owl breeding pairs have home ranges with an average of 226 ha. The home range overlap of breeding partners ranges between 5 and 33%, with an average of 16%. Most females have home ranges that are split into two separate focal areas. One part is used during breeding and the other part is used outside the breeding period. These females left the males’ home range after breeding and frequented an area far away from the breeding side (on average 1,302 m). The location of the breeding site within the home range differs significantly between males (in the centre) and females (at the edge). The home ranges of the females do not overlap with one another, nor do they overlap with the home ranges of males other than the breeding partner. The home ranges of males can overlap, but generally, the same area is used only at different, none concurrent times. The home ranges of the Pygmy Owls are dynamic. Formerly used areas are sometimes abandoned completely or for a long time, and new areas or areas that have not been used for a long time can be added. An area abandoned by an individual can be added to the home range of another individual after a period of time. The habitat preference were analysed by the generalised linear mixed model. Pygmy Owls prefer small, near-natural patches of forests that are well structured vertically and horizontally. The forest has to be made up of different tree layers or tree species or genus. Stands with a high percentage of ground cover and a high proportion of lying coarse woody debris were preferred. Stands with a minor percentage of ground cover are also preferred. Areas nearby public roads that cross the closed forest were preferred. Water resources play a primary role in the observed Pygmy Owls.