Several species of the genus Theretra, namely Theretra japonica and Theretra nessus, have been reported to pollinate the orchid species Vanda falcata.Suetsugu, K., Tanaka, K., Okuyama, Y., & Yukawa, T. (2015). "Potential pollinator of Vanda falcata (Orchidaceae): Theretra (Lepidoptera: Sphingidae) hawkmoths are visitors of long spurred orchid." European Journal of Entomology, 112(2), 393.
