Habitat preferences of breeding Eurasian Sparrowhawks Accipiter nisus in Central Europe

Abstract

ABSTRACT Capsule A description of habitats used for breeding by Eurasian Sparrowhawks, along with variables affecting their breeding habitat selection. Aims To describe the habitat preferences of breeding Eurasian Sparrowhawks, and to identify variables affecting their breeding habitat selection at different spatial scales, in a rural area of Central Europe (Czech Republic). Methods Eurasian Sparrowhawk nests were found and the habitat characteristics of breeding sites were measured at three spatial scales, and then compared with randomly selected locations. Results The nests were regularly distributed within the forests of the study area, avoiding small forest patches. The territories were somewhat associated with dense forest stands of a distinctive structure. All nests were built in coniferous trees, in the lower parts of their green crowns and close to the trunks. In the areas surrounding the nests, we found a greater abundance of some bird (prey) species and a higher diversity of birds, compared to the random areas. Conclusion The Eurasian Sparrowhawks preferred to breed in forests with a specific structure that provided sufficient concealment and access to their nests, and they located their breeding territories as far from each other as possible. The birds also seemed to prefer breeding in localities with a greater food supply. The variables affecting Eurasian Sparrowhawk breeding habitat selection may include intraspecific competition, size and structure of available forests, availability of coniferous trees for nest placement, and the composition of the food supply in the vicinity of their nests.