This was indeed the reward of trekking in Mulu national park: to see millions of bats fly in a single stream in a snaking formation . At sunset, every day, they leave the Deer Cave (where they rest and roost) to spend the night feeding on insects in the rainforest of Mulu National Park, a world heritage site in Sarawak, Malaysia. Ten trekkers from Singapore were there on 18th Sep 2008 to witness this unforgettable sight. For over 20 minutes we saw the beauty of God’s creation: bats in flight formation!