Burrowing Boa Size

The Round Island Burrowing Boa: An Enigmatic Extinct Serpent

A Mauritian Endemic Lost to Time

The Round Island Burrowing Boa (Bolyeria multocarinata) was a unique and mysterious reptile endemic to Round Island, a small island approximately 219 square kilometers off the coast of Mauritius.

Sub-fossil Evidence and Taxonomic Uncertainty

Although the species is now extinct, sub-fossil vertebrae have been found on Round Island, suggesting its former presence there. However, it remains uncertain whether these vertebrae belong to the Round Island Burrowing Boa or the extant Keel-scaled Boa (Casarea dussumieri). Arnold (1980) proposed that they might belong to the latter species, casting doubt on the historical occurrence of the burrowing boa on Round Island.

Size and Distribution

Based on comparative analysis of closely related species, it is estimated that the Round Island Burrowing Boa was similar in size to the extant Keel-scaled Boa. Records exist of large snakes on the nearby offshore islets of Gunners Quoin and Flat Island until at least the early 19th century, hinting at a wider distribution of these large snakes in the region.

Extinction and Conservation Implications

The exact cause of the Round Island Burrowing Boa's extinction is unknown, but habitat loss, introduced predators, and climate change are likely contributing factors. The disappearance of this enigmatic species highlights the fragility of island ecosystems and the importance of conservation efforts to protect unique and irreplaceable biodiversity.