Three Tibetan expressions for "dragonfly", viz. ”pad.ma.leb.sog”, ”bla.ma. ma.ni” and ”c’u.p’a.leb”, are discussed in the context of the biological features of dragonflies. The first two of them were obtained from autochtonous Tibetan informants, and the third one from Khumbu Sherpas, Nepal. The latter is the only known expression for ”dragonfly” in the Sherpa dialect. The method of linguistic field inquiry is briefly described, and a note is appended on the use of dragonfly material in the Tibetan traditional pharmacology.