Nemophora degeerella
The beautiful Yellow-barred Long-horn, Nemophora degeerella is relatively common amongst woodland over much of England and Wales. It is a resident species in Sussex and can be observed in a few places in both vice-counties. It tends to favour deciduous woodland, often damp, and around well wooded hedgerows. In May to mid-July the males, which have extremely long antennae, can often be seen flying in groups in dappled sunshine.
References:
Sterling, P., Parsons, M.S. and Lewington, R. (2012). Field Guide to the Micro-moths of Great Britain and Ireland. Gillingham, Dorset, British Wildlife Publishing, pp. 56-59, 205.
https://ukmoths.org.uk/species/nemophora-degeerella/
https://www.sussexmothgroup.org.uk/site/speciesAccount.php?speciesRef=128