The great evening bat (Ia io) is the largest bat in the vesper bat family (Vespertilionidae) and the only living species in the genus Ia. It is common to Eastern and Southeastern Asia (China, India, Laos, Nepal, Thailand and Vietnam),[1] mainly living in areas with limestonecaves at altitudes of 400–1,700 metres (0.25–1.06 mi).[6] Their roost sites have been found both near the cave entrances and up to 1.5 kilometres (0.93 mi) within the cave systems.[7]
^Soisook, Pipat; Sribuarod, Kriangsak; Karapan, Sunate; Safoowong, Mongkol; Billasoy, Sawwalak; Thong, Vu Dinh; Chang, Yang; Gong, Lixin; Lin, Aiqing; Sztencel-Jabłonka, Anna; Bogdanowicz, Wiesław; Bates, Paul J. J. (2017). "The first record of Ia io Thomas, 1902 (Mammalia: Chiroptera: Vespertilionidae) from the Sundaic Subregion, with a description of a new subspecies from peninsular Thailand". Zootaxa. 4344 (3): 573–588. doi:10.11646/zootaxa.4344.3.8. PMID29245626.
^"Great Evening Bat". China Species Information Service (CSIS). Institute of Zoology, Chinese Academy of Sciences. Archived from the original on 2006-05-15. Retrieved 2006-05-10.