Sebuku , along with Sebesi , has been noted as a " stepping stone " for butterfly migration between Sumatra and Krakatoa . There are numerous butterfly species from both Java and Sumatra on Sebuku . Four species of ants have been found on Sebuku , fewer than Sebesi and Krakatoa . These included ants not found on Krakatoa , thought to be descended from fauna that survived the 1883 eruption
1883 eruption
1883 eruption of Krakatoa
Sebuku (Sumatra)