It was getting late when I arrived but I saw at least 5. The two species are difficult to tell apart, the tip of the abdomen is blunt in Lesser Treble-bar and pointed in Treble-bar, the angle of the basal cross-band is slightly acute but this is variable.
I have previously taken the moth at home as has Simon Roddis also in Darley Dale
Lesser Treble-bar |
Lesser Treble-bar - underside of male abdomen |
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