Native Norfolk Herpetofauna include the Adder (Vipera berus); Grass snake (Natrix natrix); Slow worm (Anguis fragilis); Common/Viviparous lizard (Zootoca vivipara); Common frog (Rana temporaria); Common toad (bufo bufo); Natterjack toad (Bufo calamita); Great crested newt (Triurus cristatus); Palmate newt (Lissotriton helveticus) and Smooth newt (Lissotriton vulgaris).
Norfolk is also the reintroduction site for the native Pool frog (Pelophylax lessonae) which became extinct in the UK. A 2005 reintroduction project saw specimen brought over from Sweden to re-establish a UK population.
Like many other counties, Norfolk is also home to populations of non-native herpetofauna species. It is important to monitor these species to study their impact.