The lost vultures of Romania: reconstructing two centuries of decline from historical records and citizen science data ( Gyps fulvus , Aegypius monachus , Neophron percnopterus, Gypaetus barbatus )

Abstract Romania represents one of the few European Union member states in which all four Old World vulture species historically maintained breeding populations: the Griffon Vulture ( Gyps fulvus ), Cinereous Vulture ( Aegypius monachus ), Egyptian Vulture ( Neophron percnopterus ) and Bearded Vulture ( Gypaetus barbatus ). Until ongoing reintroduction efforts, Romania remained among the last EU countries whose former vulture guild had not yet been targeted for active recovery. Despite this exceptional significance in a European conservation context, no comprehensive synthesis of the historical and contemporary distribution of these species in Romania has been undertaken. We conducted an extensive review to gather all available vulture occurrence data and present a database of 1,136 occurrence records spanning 1818–2025. We systematically searched museum collections, historical ornithological literature, modern field surveys and citizen-science platforms. The database documents substantial breeding populations across the Carpathian arc and Dobrogea until the early twentieth century, followed by near-total breeding collapse between the 1920s and 1960s driven by persecution, secondary poisoning and agrarian transformation. In total, 148 confirmed or probable breeding records have been documented for the four species combined, with the most recent confirmed breeding records dating to 1929 ( Gyps fulvus and Gypaetus barbatus ), 1942 ( Aegypius monachus ) and 1966 ( Neophron percnopterus ). Non-breeding occurrences increase markedly after 2010, consistent with dispersal from expanding Balkan source populations. The Făgăraș and Retezat Mountains emerge as the historically most important breeding strongholds for three of the four species (all except the Egyptian Vulture). This dataset highlights the value of reconstructing historical baselines where functional extinction preceded modern monitoring, and provides an empirical foundation for reassembling a keystone scavenger guild in the Carpathian–Danube region.