The metallic coleophora moth (Coleophora mayrella) is a moth of the Coleophoridae family. It is native to Europe and Armenia, but is an adventive species in the Nearctic ecozone, where it is found throughout the United States and southern Canada. It has also been recorded from New Zealand, Chile and Argentina. The habitat consists of grassy areas and waste ground. The larvae feed within the flowers of Trifolium repens where they feed on the seeds. A larval case is built in the later stages.