Amphibians, reptiles

Žemaitija National Park is home to almost all amphibian and reptile species common in Lithuania, 9 and 6 species respectively, of which five amphibian and two reptile species are of European Community importance. Of the rarer species listed in the Lithuanian Red Data Book, three are known to live in the park: the natterjack toad (Epidalea calamita), northern crested newt (Triturus cristatus). The only known habitat of the natterjack toad discovered is in a former gravel quarry in Gardai esker. Meanwhile, the tailed amphibian, the northern crested newt, is more likely to be seen, although not as common as the smooth newt (Lissotriton vulgaris) After spawning in small pools of water in spring, newts move to terrestrial habitats in summer, where they can be accidentally found hiding under stones, firewood, logs and other objects

The grass (Rana temporaria), moor (Rana arvalis), pool (Pelophylax lessonae) and common water (Pelophylax kl. esculentus) frogs and common toad (Bufo bufo) are among the most common amphibians in the National Park. The viviparous lizard (Zootoca vivipara) is common in wetter biotopes. Because of their secretive lifestyle, legless reptiles such as slowworm (Anguis fragilis), the grass snake (Natrix natrix) and the poisonous snake, the common european viper (Vipera berus) are less frequently seen.