Population and conservation status of Kabaitari roosting site of Indian flying fox (Pteropus giganteus giganteus) (Chiroptera: Pteropodidae) in Bongaigaon District of Assam, Northeast India

Abstract

Indian flying fox (Pteropus giganteus giganteus) is a frugivorous bat species found in Indian subcontinent. It is a highly economic and ecological bat species for our forest ecosystem. Current Kabaitari roosting site has been located in the southern bank of a perennial water source of ‘Hathatiya River’ at Bongaigaon district of Assam. Populations were counted in between 22.03.2022 and 23.03.2023. ‘Direct roost count’ method was followed for survey. The annual average population of the roosting site was calculated at 460 numbers of bats. Highest numbers of bats were seen in two Bombax ceiba roosting plants present in the habitat. Heights of the roosting trees were measured between 55 to 60 feets. During winter, canopy covers of both the roosting trees were observed in completely naked condition. There were other plant species in the study area such as Anthocephalus kadamba, Areca catechu, Bambusa sp, Trewia nudiflora, Dillenia indica and some Caesalpiniaceae trees which were also used seldom by the bat individuals for roosting purposes. Recently new earth filling activities could be observed in the roosting site by a new land lord and the site is currently in vulnerable state as new construction may come up in the site where both the roosting trees may be destroyed and the entire colony may be deserted from the area in near future! So looking at the contribution of Indian flying fox in forest regeneration and extension, it’s an urgent need to start local awareness and conservation campaign to save the site from possible extirpation.