There are four amphibian species that live in the Balearic Islands.
The ferreret is the only endemic species. [1] There is debate about whether the Balearic green toad is native or introduced during prehistory due to the presence of fossil remains. [2] The Iberian green frog and the Mediterranean tree frog were introduced by humans in prehistoric times. [3]
At present, the Mediterranean tree frog has almost completely disappeared from the island of Mallorca for unknown reasons, with only a relict population surviving in the Alfabia gardens. [4]