Types of water snakes

Crotaphopeltis is a genus of small to medium snakes in the family Colubridae, the largest snake family and the one that holds most of the world's harmless and mildly venomous species. The genus is African, and its members are often grouped under common names like herald snakes or water snakes. The best-known member, the Red-lipped Snake or Red-lipped Herald Snake, gets its name from the pale to reddish coloring along the upper lip that contrasts with a darker head and body.

These snakes range across much of sub-Saharan Africa, with several species tied to moist habitats. Members are found near wetlands, marshes, streams, dams, and damp grassland, as well as in gardens and farmland where frogs are common. The genus name and the water-snake common names reflect this preference for areas with standing or slow-moving water, which concentrates their amphibian prey.

In general terms, Crotaphopeltis snakes are stout-bodied for their modest length, usually under a meter, with a head that is somewhat distinct from the neck and large eyes with vertical or rounded pupils depending on the species. Color is typically olive, brown, gray, or near-black, often with small light flecks, and the contrasting lip can be a useful field clue in the species that show it. Because several look-alikes exist in African herpetofauna, exact identification should rely on regional guides rather than a single feature.

These are rear-fanged snakes. They carry enlarged grooved teeth at the back of the upper jaw and a mild venom suited to subduing small cold-blooded prey. For the species studied, bites to humans are considered medically minor, typically producing local effects only, and these snakes are not regarded as dangerous in the way front-fanged elapids or vipers are. That is not a reason to handle a wild snake. Any wild snake can bite, identification mistakes happen, and individual reactions vary. Do not handle, catch, or provoke one. If a bite occurs and symptoms develop or the snake is not confidently identified, seek medical care and contact emergency services, or US Poison Control at 1-800-222-1222 if you are in the United States.

Ecologically, Crotaphopeltis snakes are largely nocturnal hunters that feed heavily on frogs and toads, with some also taking lizards and other small animals. They are egg-laying. When threatened, several will flatten the head and body, hiss, and strike defensively, a bluff display that makes them look fiercer than they are. Their close ties to wetlands and amphibians make them useful indicators of healthy moist habitats.