There are almost a few studies that focus on the importance of forests for the bat species in Turkey. The forest ecosystem is sometimes roosting, sheltering and feeding environment for bats as well as the other species. In this study that was partially supported by The Rufford Foundation (RF, project no: 26671-B) and Idea Wild (bat betector was gifted to the researchers); diversity, richness, abundance and activity density of the bats within the borders of Köyceğiz-Dalyan Specially Protected Area in Muğla Province of Turkey were analyzed. During this study, which performed between July 2017 and July 2019, the empirical observations in 10 different Anatolian sweetgum forests ranging from 30 hectares to 250 hectares, as well as mist-net installation, use of sweep-net, 18 bat boxes (house) placement, use of 1 manual and 2 full-spectrum bat detectors (67 days in total-1978 voice records) was preferred as a method. As a result of the study, presence of 11 bat species in total was recorded in the Anatolian sweetgum forests and related habitats in the surrounding area. Myotis daubentonii, Myotis emarginatus, Pipistrellus nathusii, Pipistrellus pygmaeus, Plecotus macrobullaris species were recorded for the first time in the Southwestern Anatolia within this study.