Oaks (Quercus sp.) and only oaks? Relations between habitat structure and home range size of the middle spotted woodpecker (Dendrocopos medius)

Abstract

Maintenance of viable populations requires detailed knowledge of a species' area demands and of the mechanisms influencing them. From 1992 to 1996, I examined, in northern Switzerland, the relations between habitat factors and home range size of 33 radio-tracked middle spotted woodpeckers (Dendrocopos medius), an endangered species confined to mature oak forests. Stepwise backward multiple regression revealed that home range size decreased from winter to late spring; furthermore, range size was inversely correlated to the densities of Show more