Based on its named, this island is surrounded by mangrove where thousands bats or flying fox lived. Bats or Flying fox is called Kalong by the local. Kalong Island located in a row of small islands inside Komodo National Park area. The best time to visit Kalong island is at late afternoon to evening for sunset time. Starting from some bats flying in circle on the trees then continue to flying across the mangroves follows by the other big groups of bats. Its like they want to welcome every tourist which watch them from the boat. Some of the tourist sometime wants to see the bats near the mangrove or even want to explore inside the mangrove, however it is not recommended for safety reason. The mangrove where the bats live, is also inhabitant by snakes, and it is untouchable by human. However, this island condition makes the Kalong island remain sustainable and safe from those who will destroy the island’s ecosystem.