Snake Identifier
Dwarf Sand Boa (Eryx miliaris)
BennyTrapp Eryx miliaris by Benny Trapp, via Wikimedia Commons, licensed under CC BY 3.0
Boas

Dwarf Sand Boa

Eryx miliaris

A small, sandy-colored burrowing boa widespread across Central Asian deserts and steppe, one of the more common sand boas in the region.

Venomous?
Non-venomous
Adult length
0.4-0.7 m (1.3-2.3 ft)
Range
Central Asia (Caspian region to Mongolia)

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Overview

The dwarf sand boa is a small, non-venomous burrowing snake widely distributed across the arid steppe and desert regions of Central Asia. It is one of the most commonly encountered sand boas within its range, adapted to a fossorial lifestyle.

Despite its common name, it is not exceptionally small compared to many other Eryx species, but the name distinguishes it from the larger Tartar sand boa found in overlapping regions. It poses no venom risk to humans.

How to identify it

Dwarf sand boas have the characteristic stocky, cylindrical build of the sand boa genus.

  • Coloration is typically sandy yellow, gray, or tan, with darker, often faint blotching
  • Small eyes positioned high on the head
  • Short, blunt tail resembling the head, used defensively
  • Adults typically reach 0.4-0.7 m (1.3-2.3 ft)
  • Generally smaller and more uniformly patterned than the Tartar sand boa found in the same region

Habitat & range

This species inhabits sandy and semi-desert habitats across a broad swath of Central Asia, from the Caspian Sea region through Kazakhstan and into Mongolia. It favors loose, sandy substrates for burrowing.

It can also be found in semi-cultivated land and steppe grassland with suitable soil conditions.

Behavior, diet & reproduction

Dwarf sand boas are nocturnal and fossorial, hunting small mammals, lizards, and birds by ambush from beneath the sand or soil surface, subduing prey through constriction.

They are ovoviviparous, giving birth to live young in litters typically numbering under ten. They are generally docile, favoring burrowing and camouflage over active defense.

Frequently asked questions

Is the dwarf sand boa venomous?

No, it is a non-venomous constrictor.

How big does the dwarf sand boa get?

Adults typically reach 0.4-0.7 m (1.3-2.3 ft).

Where is the dwarf sand boa found?

It occurs across Central Asian steppe and desert regions, from the Caspian Sea to Mongolia.

How is the dwarf sand boa different from the Tartar sand boa?

It is generally smaller and more uniformly patterned than the larger Tartar sand boa found in overlapping range.