Botanophila fonsecai, also known as Fonseca's seed fly, is a small fly endemic only to an approximately 100m stretch of coastal dune system of North-Eastern Scotland. The fly is named after British entomologist Evelyn d’Assis-Fonseca. It is classified as an endangered species by the IUCN Red List due to its small habitat range and constant threats to these limited environments. The fly is probably the rarest endemic insect species in the UK.