How to Identify the Yellow-bellied House Snake (Identification Guide)

Key identifying features

The yellow-bellied house snake is a small, slender, non-venomous colubrid found across parts of southern and eastern Africa. It is most reliably recognized by the contrast between a dark, glossy dorsal surface and a vivid yellow or cream belly, which gives the species its common name. A pale, often cream or straw-colored stripe frequently runs along each lower flank, separating the dark back from the lighter belly, though this stripe can be faint or absent in some individuals.

Coloration & pattern

Dorsal coloration ranges from dark brown to blackish-brown or grayish-brown, usually appearing uniform rather than patterned. Some individuals show a faint lightening along the sides that blends into the flank stripe. The belly is a clear, often bright yellow, sometimes tinged with cream or orange, and this color can extend slightly onto the lowest row of dorsal scales. Juveniles tend to show more contrast between the dark back and pale belly than older adults, whose colors may dull slightly with age.

Head, eyes & scales

The head is only slightly distinct from the neck, with a rounded snout and smooth, glossy scales typical of house snakes. The eyes are medium-sized with round pupils, consistent with its nocturnal to crepuscular habits. Dorsal scales are smooth and arranged in relatively few rows, contributing to the snake's characteristic sheen. There is no obvious neck constriction or triangular head shape, which helps separate it from vipers found in the same region.

Size & body shape

This is a modestly sized snake, with most adults reaching roughly 40 to 70 centimeters in total length, occasionally a bit longer. The body is slender and cylindrical, tapering to a moderately long, thin tail. Overall build is lightweight and agile, suited to a life spent hunting in rock crevices, leaf litter, and around human dwellings.

Range & habitat where you'll see it

The yellow-bellied house snake occurs widely across savanna, grassland, and semi-arid habitats in sub-Saharan Africa, and it readily adapts to disturbed environments, including gardens, farmland, and the walls or foundations of houses, which explains its common name. It is most active at night, sheltering by day under rocks, logs, debris, or within wall cavities, and is often encountered when such shelters are disturbed.

How to tell it apart from look-alikes

Several small dark snakes overlap in range, but the yellow-bellied house snake's smooth, glossy dark dorsum paired with a bright yellow venter and lack of a triangular, venom-gland-swollen head is diagnostic. Similar house snake species may show more mottling or a different belly tone, while venomous look-alikes with dark backs typically have a more robust body, distinct head shape, or different pupil shape. The lack of banding, blotches, or strong dorsal patterning, combined with the smooth scalation, further distinguishes it from many other regional species.