Insight: This common moth is found throughout most of the UK between March and April. It is attracted to light and can often be seen feeding at sallow blossoms at night.
The scientific name refers to the black mark on its forewing that resembles a Gothic arch, though as Emmet says “this looks more Norman than Gothic“! The English name also refers to the black mark, noting its similiarity to the letter ‘Nun’ in the Hebrew alphabet.
In a small percentage of specimens, most frequently in the North, this mark is not black but of a similar colour to the brown shades of the rest of the wing making it far less obvious.
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