Sgorlon, Giacomo. “Breeding of Great Spotted Cuckoo, Clamator Glandarius, Has Been Verified in the Province of Venice (N Italy)”. Rivista Italiana di Ornitologia 80, no. 1 (December 31, 2010). Accessed November 21, 2024. https://sisn.pagepress.org/rio/article/view/91.