Nationally scarce (Nb) in marshes and on river-banks in parts of the British Isles, more numerous in the north. There have been no recent records from Hampshire or the Isle of Wight, and it is unlikely that records of this species will be accepted unless the specimen is retained for examination. Wingspan 13-18 mm. Differs from O. palustrana by its broader and apically less angulate forewings [Bradley]. Larva feeds on various mosses.