First observation of Lesser Crested Tern (Thalasseus bengalensis) in Liguria, northwest Italy

Abstract

This work reports an observation of lesser crested tern (Thalasseus bengalensis), documented through photographs collected off the coast of Imperia in August 2024. Following an extensive literature review, this represents the first recorded sighting of the species in the Liguria region, underscoring the importance of opportunistic observations in understanding the phenology of both regular and rare seabird species. Furthermore, this work reviews the distribution of the lesser crested tern, with an emphasis on breeding events and observational records across Europe, particularly in Italy.