Erycinae

Distribution and habitat

Erycines are found in Southeastern Europe, Asia Minor, North, Central, West and East Africa, Arabia, Central and Southwest Asia, India, Pakistan, Sri Lanka, southwestern Canada, the western United States, and northwestern Mexico.

Fossil erycines have been found in rock strata over 50 million years old, and were once widespread in North America. Now, only four species remain in North America, as well as the Old World sand boas proper in Africa, Asia, and Southeastern Europe.

The oldest known erycines are from the Eocene-aged Messel Pit in Germany, named Rageryx schmidi.

Behavior

The majority of sand boas spend much of their time basking below the surface of the sand, with only their eyes or head exposed. When potential prey approaches, they erupt out of the sand, bite, and employ constriction to subdue it.

Feeding

The erycines' primary diet is rodents, but they have also been known to prey on lizards and birds.

Reproduction

Otherwise far removed from their boine relatives, erycines are generally ovoviviparous, i.e., giving birth to live young. At least two species lay eggs, however: the Arabian sand boa, Eryx jayakari, and the West African sand boa, Eryx muelleri.

Smuggling and poaching in India

Poaching and smuggling of sand boas is often reported in India. Most of the smuggled snakes go to the United States. There is a misconception about their medicinal and aphrodisiacal properties, as well as the belief that keeping this snake as a pet brings wealth and prosperity.

Captivity

Eryx colubrinus, E. conicus and E. johnii are frequently available in the exotic pet trade and are often captive-bred. They breed readily, their small size making them an attractive option. They are usually not aggressive species, though they sometimes have a tendency to bite, and also spend the vast majority of their time hiding. Other species are not commonly available, but are occasionally imported.

Genera

• Not including the nominate subspecies.
  ^T Type genus.