sentence: it is found in the nicobar islands , eastern india ( assam ) , bangladesh , myanmar , thailand , cambodia , laos , central and southern vietnam , west malaysia , singapore , philippines ( leyte , luzon , mindanao , samar , negros , panay , etc. ) , indonesia ( sulawesi , ambon island , sumatra , borneo , east malaysia , brunei , nias , enggano , simeulue , java , sumbawa , halmahera , ceram , seram , buru , east timor , bali , palawan and maluku ) , and possibly china ( guangxi and guangdong ) and sri lanka .