Big-eyed Rat Snake

Big-eyed Rat Snake (Ptyas dhumnades) is a snake recorded for Vietnam in the project inventory. Its supporting occurrence note is “Expert range list”. The accepted scientific name is retained because regional snake taxonomy and species boundaries can change, while similar-looking species may require scale counts, anatomy or genetic evidence for reliable separation. This profile therefore distinguishes the recorded identity and occurrence from broader biological context instead of inventing unsupported locality, size, diet or breeding details (project species data; Reptile Database taxonomy).

Ptyas rat snakes are large, fast, day-active colubrids that forage widely on the ground and climb when needed. They pursue rodents, frogs, lizards and other vertebrate prey without venom, relying on speed and strong jaws rather than obligate constriction. Several species tolerate edges or agricultural landscapes, although habitat varies. These are genus-level notes rather than confirmed observations for this Vietnamese species, so exact size, prey, habitat and clutch data are omitted (general Ptyas account; Reptile Database).