 Similarly, introduction of alien predators (like cats that become feral) will jeopardize breeding on offshore islets, but this is also not believed to have been significant at the time the records ceased.At any rate, the species is not found anymore on Burong, the Mentawi and the Riau Islands today, and likely only occurs on Siberut, Simeulue, and some of the surrounding islets.There are some 1980s and 1990s records, supposedly of large numbers of individuals, from Padang-Sugihan Wildlife Reserve and Sembilang River in South Sumatra, and Berbak National Park in Jambi province.