Salvo G. [The decline of one of the most threatened European birds of prey: 41 years of observations on the Lanner, <em>Falco biarmicus</em> in Sicily]. Riv Ital Ornitol [Internet]. 2020 May 29 [cited 2024 Nov. 24];89(2). Available from: https://sisn.pagepress.org/rio/article/view/454