Ypsolopha parenthesella (Linnaeus, 1761)
17.0100 (B&F: 460)
Ypsolopha costella (Fabricius, 1775)
A widespread resident that generally occurs singly or sparingly at mv light, although it is sometimes fairly common to common in deciduous woods in both vice-counties. It appears to be single-brooded, flying mainly from late July to late September. Adults have however been seen in almost every week from late June to mid October and then again after hibernation from mid March to early May. The larvae feed on oak, hornbeam, birch and alder. (Pratt, 2011).