Yorkshire Status: Rare and very local resident.

Sutton & Beaumont, 1989: There are one or two recent records from each vice-county except VC62.

2012 (CHF): There are occasional records in buckthorn-rich areas of south VC63, but our biggest populations are in the limestone Dales where large numbers (over 200 in a good year) can be found hibernating in caves. Buckthorn is present in these areas but is not common and it is not impossible that another food source is being utilised. Larvae have not yet been found in this area.

Argus 72, 2014: No records at light this year. Numbers were lower over-wintering in the main cave in the Dales with a maximum of 165 on 15th October, and smaller numbers reported from several other caves and mine shafts in the area. A mark and recapture scheme proved that moths can fly at least seven miles to over-wintering caves. Larvae would only accept buckthorn (Rhamnus cathartica) and refused all other food plants. The VC62 record was unusual, a large distance from any other records and with no apparent buckthorn in the area.

	Retained Specimen / Photograph will be Required.

Recorded in 56 (28%) of 200 10k Squares. First Recorded in 1806. Last Recorded in 2022. Additional Stats

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