Animal Database

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Animal Database
Animal Database
Round Island Burrowing Boa
Range Round Island, Mauritius.
Scientific Classification
Kingdom Animalia
Phylum Chordata
Class Reptilia
Order Squamata
Family Bolyeriidae
Genus Bolyeria
Species Bolyeria multocarinata
Conservation Status
Bolyeria Multocarinata Île Ronde, Mauritius 1972

Extinct 1974-1975

The Round island burrowing boa (Bolyeria multocarinata), is a extinct species of snake in the Bolyeriidae family, in the monotypic genus Bolyeria, which was endemic to Mauritius. The species was last seen on Round Island in 1975. No subspecies are currently recognized.


It reached about 1 m (3 ft 3 in) in length, but preserved specimens have reported total lengths of 54–140 cm. Its colour was described as light brown with blackish spots dorsally and pink marbled with blackish ventrally. It had a pointed snout with a cylindrical body and head. Its general body form suggests that the Round Island Burrowing Boa had fossorial tendencies. This species' closest living relative is the Round Island Boa (Casarea dussumieri).


The diet of this snake is unknown, but it is thought to have eaten lizards.

Geographic Range[]

The boa had an extremely small range of only 1.5 square kilometres (0.58 sq mi). Its habitats were hardwood forests and palm savanna. In the past it was found in Mauritius on Gunner's Quoin, Flat Island, Round Island and Ile de la Passe. It survived the longest on Round Island, where it was last recorded. The type locality given is "Port Jackson" (in error).

Conservation Status[]

This species is classified as Extinct (EX) on the IUCN Red List of threatened species (v2.3, 1994). It was already rare by 1949 and was last seen in 1975. Reasons for its extinction are habitat loss caused by soil erosion due to overgrazing by goats and rabbits.