New provincial records and an updated list of snakes (Squamata: Serpentes) from Xuan Lien nature reserve, Thanh Hoa province, Vietnam

We report six new records of snakes from Thanh Hoa province based on newly collected specimens from Xuan Lien Nature Reserve, comprising three species of Colubridae (Lycodon futsingensis, L. meridionalis and Oreocryptophis porphyraceus), two species of Natricidae (Hebius boulengeri and Parahelicops annamensis), and one species of Elapidae (Bungarus slowinskii).