Expansion of the Eurasian Crag Martin Ptyonoprogne rupestris (Scopoli) in Sicily (Aves Hirun dinidae). Data collected during the last fifteen years on the distribution of the Eurasian Crag Martin
in Sicily and the comparison with those recorded in literature show an expansion trend for this species. While in the newly colonized areas the nesting sites have been observed mainly on natural
habitats, where its occurrence was previously recorded the species shows and adaptation to exploit also anthropogenic habitats, such as buildings or other infrastructures
