Common in bird nests throughout much of Britain and Ireland. In Hampshire recorded widely throughout, and on the Isle of Wight, after being historically rare, increased recording activity in the 21st century has revealed its true status as being equally widespread. Systematic collection of old bird-nests during the winter months would likely result in many more records of this and other related species. Wingspan 14-22 mm. Resembles
T. trinotella, which see for differences. Larva feeds on detritus in bird nests and sheep's wool.