The English and scientific names of this moth are derived from the distinctive yellowish colour of the antennae. The forewings of the English subspecies are grey or greenish-white with a large pale spot near the centre of the leading edge. The Scottish subspecies is a darker grey.
The caterpillars can be found from mid-May to mid-July feeding at night and resting between two leaves spun flat together during the day. They overwinter as pupae on the ground amongst leaf litter.
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