Keeled Rat Snake

The keeled rat snake is one of the largest colubrid species in Southeast Asia, inhabiting rainforest and forest-edge habitats across the Malay Peninsula, Sumatra, and Borneo. It is named for its distinctly keeled dorsal scales.

It is non-venomous and not considered dangerous, though its large size and speed can make it an imposing snake to encounter.

Its substantial length ranks it among the largest colubrids in the region, alongside its close relatives in the genus Ptyas.

The body is typically dark brown to blackish, often with paler edges to individual scales creating a subtly reticulated appearance.

• Strongly keeled dorsal scales, giving a rough texture unusual among rat snakes
• Large, elongated head
• Round pupils
• Robust, muscular body for its length
• Adults can reach up to 2.7 m or more

This species inhabits lowland and hill rainforest, forest edges, and sometimes cultivated land across the Malay Peninsula, Sumatra, and Borneo, generally staying near forested cover.

The keeled rat snake is diurnal and fast-moving, both on the ground and capable of climbing when needed. It can be defensive if cornered, hissing and striking.

It preys on rodents, birds, and other small vertebrates. It is oviparous, laying clutches of eggs, though detailed reproductive data in the wild remains limited.