This database from the Department of Entomology at the Natural History Museum, London contains information on worldwide caterpillar hostplants. It consolidates a large amount of data on plants that the 22,000 Lepidoptera species eat or otherwise interact with. Users can perform searches using scientific name of either the Lepidoptera or hostplant species, or perform a "drill-down" browse. Search results include the family, genus, and species names for both the Lepidoptera and hostplant; author of the primary literature; and additional information that includes location where the species is found and plant damage resulting from interaction.