Eudonia laetella is a species of moth in the family Crambidae described by Philipp Christoph Zeller in 1846.[1] It is found in Fennoscandia, the Baltic region, Belarus, Russia, Poland, the Czech Republic, Slovakia, Hungary, Romania, Bosnia and Herzegovina, the Republic of Macedonia, Greece, Slovenia, Austria, Switzerland, Italy, Germany and Belgium.[2]
The wingspan is 16–20 mm. Adults are on wing in January and from June to August.
The larvae feed on moss on trunks.[3]