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We map the yearly expansion rate of the snake and estimate via transect surveys how severely it affects the distribution and abundance of the endemic lizard. As well, we surveyed 9 of 30 small lizard populations on islets surrounding Ibiza that have been isolated since the Last Glacial Maximum. Snakes had invaded 49% of Ibiza’s land area by 2018, and censuses show a critical contrast in lizard abundance between areas with and without snakes; almost all censuses in areas without snakes show lizard presence whereas nearly all censuses in areas with H. hippocrepis lack lizard sightings.  Leer más.

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Invasive snakes represent a serious threat to island biodiversity, being responsible for far-reaching impacts that are noticeably understudied, particularly regarding native reptiles. We analysed the impact of the invasive California kingsnake, Lampropeltis californiae—recently introduced in the Canary Islands—on the abundance of all endemic herpetofauna of the island of Gran Canaria.  Leer más.

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Ons y Cíes preservan dos poblaciones de salamandras cuyos ancestros se quedaron aislados del continente con la formación de las islas hace varios miles de años. Los ejemplares actuales han desarrollado un cambio importante en su método reproductivo que les ha permitido sobrevivir sin depender de ríos, lagos ni lluvias. Mientras sus primos del continente ponen larvas en el agua para asegurar su descendencia, las salamandras insulares paren ejemplares juveniles y en tierra. Leer más.

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