There are 12 reptile species, not counting the spur-thighed tortoise which breeds just outside the park's limits near the village of Pastra. The largest diversity is found in the lower zones - 10 species. Rila Monastery Forest Reserve is home to 5 reptile species. The population of the Aesculapian snake is of European importance. Of national importance are the populations of the slowworm, viviparous lizard, smooth snake and common European viper. The amphibians are represented with 11 species, with highest diversity in the wet deciduous forests and the forest streams. Rila Monastery Forest Reserve is the most important area for amphibians conservation. Three species have a population of national importance: the Alpine newt, yellow-bellied toad and common frog.