A captive-breeding program was established in 1997, and in December 2006, the five adult tortoises were returned to the wild on Silhouette Island, forming the first wild population of this species since the early 19th century.
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Acanthennea erinacea is endemic to Silhouette Island and Mahé Island, the Seychelles.
It is found on all the islands with amphibians, namely Mahé, Praslin, Silhouette, Ste. Anne, Curieuse, La Digue, Cerf, and Frégate.
It is restricted to the high- and mid-altitude areas of Mahé and Silhouette Islands of the Seychelles group.
They naturally occur on the Mahé and Silhouette Islands of Seychelles where they grow in mountainous rainforest and are threatened by habitat loss.
It is endemic to Seychelles, now confined to six small areas on Silhouette Island at altitudes between 400 and 700 meters, having become extinct on Mahé.