Snake Identifier
Fork-marked Sand Snake (Psammophis trigrammus)
Psammophis trigrammus 102740173 by Ryan van Huyssteen, via Wikimedia Commons, licensed under CC BY-SA 4.0
Colubrids

Fork-marked Sand Snake

Psammophis trigrammus

A slender arid-zone sand snake named for the fork-shaped marking on its head, found across the dry western landscapes of southern Africa.

Venomous?
Mildly venomous
Adult length
0.5-0.9 m (1.6-3.0 ft)
Range
Southwestern Africa (Namibia, South Africa)

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Overview

The fork-marked sand snake is a slim, fast-moving snake inhabiting the arid western reaches of southern Africa. Its common name references a distinctive forked or Y-shaped marking on the head, a feature shared with some other members of the Psammophis genus.

This species carries mild rear-fanged venom used to subdue small prey, and while venomous, it is not considered a threat to human health.

How to identify it

  • Slender body, sandy tan to gray-brown, often with faint longitudinal striping
  • Distinctive fork- or Y-shaped dark marking on the top of the head
  • Large eyes with round pupils
  • Smooth scales
  • Long, tapering tail

The forked head marking is the primary distinguishing feature separating this species from similarly built sand snakes in the same range.

Habitat & range

This species occurs in arid and semi-arid habitats of Namibia and western South Africa, favoring sandy flats, scrubland, and rocky terrain typical of these dry regions.

Behavior, diet & reproduction

Fork-marked sand snakes are diurnal and highly active, using speed and vision to hunt lizards and small invertebrates, which they subdue with mild venom. They are alert and quick to flee into cover when disturbed. Reproduction is oviparous, with small clutches of eggs laid in sheltered underground sites.

Frequently asked questions

Is the fork-marked sand snake venomous?

It has mild rear-fanged venom but poses no significant danger to humans.

How big does it get?

Adults typically reach 0.5-0.9 m (1.6-3.0 ft).

Where is it found?

It occurs in arid regions of Namibia and western South Africa.

What gives the fork-marked sand snake its name?

A distinctive fork- or Y-shaped dark marking on top of its head.