Friday, 10 July 2026

Thursday night at Cwmerfyn. 09/07/2026.

A rather humid, full night survey on a mixed grassy, scrubby slope c.280m above Cwmerfyn produced 70 species on Thursday night. 

The likelihood is this is a Red Underwing but I am stumped by the "inner central cross-line bends outwards so it usually touches pale central mark" (Waring, Townsend & Lewington) which is characteristic of a possible immigrant Dark Crimson Underwing (very similar to the example in Chris Manley) but does not have a convincing deep "W" on the outer cross-line. More like a "V".

Any help on this would be great.



Also recorded what I suspect to be a Northern Rustic? 


Not recorded this before so a confirmation would be much appreciated.

Many thanks,

Phil.

Additional photo received from Sam Grinsted who managed to get a shot of the red hindwing (apologies for the poor quality photo but it shows the important bit!)



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