Herpetological Conservation and Biology 13(1):146–157. Submitted: 29 September 2017; Accepted 3 January 2018; Published 30 April 2018. THE SPREADING OF THE INVASIVE ITALIAN WALL LIZARD ON VULCANO, THE LAST ISLAND INHABITED BY THE CRITICALLY ENDANGERED AEOLIAN WALL LIZARD MARCELLO D’AMICO1,2,3,5, GIULIA BASTIANELLI4, FRANCESCO PAOLO FARAONE2, AND MARIO LO VALVO2 1Department of Conservation Biology, Doñana Biological Station CSIC, Calle Américo Vespucio s/n, E-41092 Seville, Spain 2Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, Via Archirafi 18, 90123 Palermo, Italy 3Present address: REN Biodiversity Chair, CIBIO-InBIO (University of Porto) and CEABN-InBIO (University of Lisbon), Tapada da Ajuda s/n, Lisbon 1349-017, Portugal 4Research Unit on Biodiversity (UO, CSIC, PA), University of Oviedo, Calle Gonzalo Gutiérrez Quirós s/n, Mieres E-33600, Spain 5Corresponding author, e-mail:
[email protected] Abstract.—The Aeolian Wall Lizard (Podarcis raffoneae) is an endemic species of the Aeolian Archipelago of Italy (Mediterranean Sea). Its distribution is limited to three islets and two relict populations on a relatively large island: Vulcano (a population on the summit of Gran Cratere volcano and another on Capo Grosso promontory). The critically endangered Aeolian Wall Lizard is threatened by the introduction of the Italian Wall Lizard (Podarcis siculus), which successfully competes and hybridizes with the endemic lizard. The invasive lizard is widespread on Vulcano, although the literature does not provide the exact distribution. Our first aim was updating the distribution of the Italian Wall Lizard on Vulcano, with special attention to the last enclaves of the Aeolian Wall Lizard.