Snake species from the Pernambuco Endemism Center. A Erythrolamprus taeniogaster B Erythrolamprus viridis C Helicops angulatus D Helicops leopardinus E Hydrodynastes gigas F Imantodes cenchoa G Leptodeira annulata H Lygophis dilepis I Oxyrhopus guibei J Oxyrhopus petolarius K Oxyrhopus trigeminus L Philodryas nattereri M Philodryas olfersii N Philodryas patagoniensis O Phimophis guerini. Photograph credits: Frederico França (A, C, F, H, I, K, M, N, O), Vanessa Nascimento (B, D), Ivan L. Sampaio (E), Willianilson Pessoa (G), Rafaela França (J, L).