Types of groundsnakes

Stegonotus is a genus of nonvenomous snakes in the family Colubridae, the largest snake family and a group that holds the majority of the world's living snakes. Like most colubrids, these are typical-looking snakes built around a single functional lung, smooth or lightly keeled body scales, and a head covered by large, regular plate-like scales. Members are commonly called ground snakes for their habit of moving and foraging on or near the surface. Our database holds 10+ species in this genus.

The genus is centered on the Indo-Australian region. Stegonotus snakes occur across New Guinea and surrounding islands of Wallacea and the Philippines, extending into parts of northern Australia and Southeast Asia. They are generally lowland and forest-associated animals that turn up in rainforest, forest edge, plantations, gardens, and other moist habitats, and several species do well in disturbed and human-modified settings. Many island species are localized, and the genus has been actively revised as new forms are described, so distribution details for individual species continue to be refined.

Recognizing a Stegonotus comes down to general build rather than flashy pattern. These are medium-sized, fairly solid-bodied snakes with a head that is noticeably distinct from the neck and a somewhat blunt snout. Coloration is usually plain and understated, with the common Slaty-grey Snake living up to its name in slate, grey, or dark brown tones, while other members carry darker heads or muted bands. They lack the bright warning colors of many dangerous snakes, and identification is best confirmed by locality and scale detail rather than color alone.

Stegonotus snakes are not venomous and are considered harmless to humans. They are not front-fanged venom-delivery animals; within Colubridae some lineages are rear-fanged, but Stegonotus is not regarded as medically significant and is not a danger to people. A frightened individual may flatten, musk, or bite defensively, and any bite from a wild snake should be cleaned and watched. As with all wild snakes, the sound approach is to observe and leave it alone rather than handle it, both for the animal's sake and because field identification can be uncertain. If you are bitten and unsure of the species, contact local emergency services or US Poison Control at 1-800-222-1222.

Ecologically these are nocturnal, ground-active predators. Their diet is broad for their size and can include frogs and frog eggs, small reptiles and reptile eggs, and small mammals, with at least one member known as the Batjan Frog-eating Snake for its amphibian focus. Like many colubrids, Stegonotus snakes are egg-laying. They spend the day hidden under logs, leaf litter, and ground cover and emerge after dark to forage, filling a quiet but important role as small predators across the forests and islands they inhabit.