An aggregate of 4 . A species were appearance alone can not be taken as reliable although some pointers can be useful in narrowing down ID eg Over all colour Eg melanic or dark especially when some show marked melanism making it difficult to differentiate . forking of vein 3 &4 , relation to discal spot if visible , gender etc can be taken to narrow down on probability but not definitive enough to be absolute. The Small Autumnal poses less of a problem as size habitat Moorland and phenology earlier aid in its id
British and Irish moths: an illustrated guide to selected difficult species
Gen Det agg species
November Moth Epirrita dilutata
Pale November Moth Epirrita christyi
Autumnal Moth Epirrita autumnata
Small Autumnal Moth Epirrita filigrammaria
November Moth Epirrita dilutata agg
November Moth Epirrita dilutata agg
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