Psammophylax rhombeatus (Linnaeus, 1758)

Dorsal Coloration

Psammophylax rhombeatus (Linnaeus, 1758) has body colour ranging from grey to various shades of brown. Following its name, the back of this species is patterned with rhombuses, which occur in a range of different patterns and colours.

Ventral Coloration

The ventral body colour of this snake ranges from yellow to white.

Body Length

This species is typically 45 to 85 centimetres in length, though recorded measurements have reached up to 140 centimetres.

Reproductive and Feeding Traits

Like its close relatives in the genus Psammophylax, P. rhombeatus lays eggs and actively hunts for prey, which are behaviours typical of whipsnakes.

Body Build

However, unlike slender-bodied whipsnakes, Psammophylax has a more robust build. This difference in body shape likely reflects how each species has adapted to its specific environment and lifestyle.

Taxonomy

P. rhombeatus is an African grass snake that belongs to the family Lamprophiidae, a group of snakes that are typically small to medium in size.

Habitat and Activity

This species inhabits moist savanna and grassland biomes, and is described as terrestrial, diurnal, and an active forager. It is adapted to life on the ground, and actively hunts for prey during the daytime.

Foraging Behaviour

Its foraging behaviour relies on actively searching for food instead of using ambush tactics, which lets it extensively explore its environment to find prey including small mammals, birds, and reptiles.

Geographic Distribution

Its distribution extends across Western Cape, Kwazulu-Natal, Lesotho, Free State, Eswatini, northwards through Northern Cape to Namibia and southern Angola in the west, and to South Africa's Limpopo province in the east.

Reproductive Mode

For reproduction, P. rhombeatus, also called the rhombic skaapsteker, falls between oviparity and ovoviviparity, as it lays eggs that are already partly incubated.

Breeding Season

The breeding season usually takes place during the summer months.

Clutch Size

A female can lay a clutch of 8 to 30 eggs.

Egg Deposition

Females typically deposit eggs in concealed locations such as under rocks or in leaf litter, to protect the eggs from predators and harsh environmental conditions.

Maternal Care

During incubation, the female displays protective behaviour towards her eggs, and may coil around the clutch to provide warmth and protection until hatching. This maternal care is critical for the survival of developing embryos.

Incubation Period

The incubation period varies, but generally lasts from several weeks to a couple of months, depending on environmental factors such as temperature and humidity.

Lifespan

The lifespan of Psammophylax rhombeatus in the wild has not been definitively confirmed, but like many small to medium-sized snakes, it likely lives for at least 10 years or more.

Survival Factors

Survival and reproductive success for this species are shaped by factors including habitat availability, prey availability, and interactions with other species in its ecosystem.