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Notes:
Local in woodland, parks, hedgerows, scrubby downland and gardens, throughout England and Wales; widely distributed, but perhaps decreasing, in Hampshire and the Isle of Wight. Wingspan 42-50mm. Probably easier to confuse with Dusky Thorn E. fuscantaria than September Thorn E. erosaria, which see, since a good proportion of August Thorn show dark shading between outer cross-line and outer edge of wing, the stated diagnostic feature for Dusky Thorn; the three species all show subtle differences in the way the outer cross-line meets the costa. Larva feeds on Pedunculate and Sessile Oak, over-wintering as an egg.
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