On urbanisation of Nyctalus noctula and Pipistrellus pygmaeus in Slovakia

The reproduction of Nyctalus noctula in a building in Slovakia was confi rmed. It is in accor- dance with considerable increasing of the species occurrence in urban habitats during the last years. The fi rst roost of Pipistrellus pygmaeus in Slovakia was found in a prefab house. Few individuals were mixed with Pipistrellus pipistrellus during spring migrating period. Subsequently, the fi rst nursery of P. pygmaeus in Slovakia was confi rmed in the similar urban habitat. Conservation activities in prefab buildings should consider this fact. Nyctalus noctula, Pipistrellus pygmaeus, roosts, reproduction, fi rst records