Bats (Chiroptera) are the only type of mammals that can fly. Bats have high mobility in foraging activities such as flowers, fruit, nectar, and insects at night. The Isau-Isau Wildlife Reserve (WR) Sumur Tinggi Area has a function as a protection area. Information about bats in Isau-Isau WR is not available until now. This study aims to determine and identify the types of bats in the Isau-Isau …