This photo (copied from entomart.be as I don't have my own) shows the diagnostic features
of Celypha lacunana: the dark band across the wing (highlighted here with 2 blue lines)
is split by a pale bar (ringed in yellow). That bar across the dark band is really distinctive, so please learn it!!
Actually, it's worth learning Bactra lancealana too, as it's abundant in rushy areas and often comes to MV.
This photo (from montgomeryshiremoths.org.uk) highlights the diagnostic
dark V of Bactra lancealana. There are other, rarer Bactra with that V, but they are rare and habitat-specific.
The relatively long wings is also classic of B lancealana.
and if you're walking anywhere rushy, you'll probably see Glyphipterix thrasonella, so it's worth a search for images of that one...
Such lessons are very handy for micro-starters like me - please keep on doing them Sam.
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