Yorkshire Status: Local resident.

White-marked has a curious disjunct population; moths in Yorkshire and Cumbria being well separated from those in the south of England. In 1883 Porritt said it was "not of general occurrence" and listed Bishop's Wppd, Conisbrough and Doncaster as sites. In 1904 he wrote "still occurs in abundance at Bishop's Wood". Does it still occur there? It was last seen in 1997, but there has been little recent trapping at this site. The only place in the county where it is at all common is a small area to the north and north-west of Ripon where counts can be large. The biggest numbers are from Bellflask, eg 77 on 2/4/2011. Elsewhere it can be found in much smaller numbers at various sites in VC62 and in the south of VC64. It is very rare to find it in VC61 or 63. One at Spurn on 19/4/2018 may have been a migrant. Quite what makes its core area attractive to it is something of a mystery. It would be nice to know more about its habitat requirements and what it feeds on. Larvae have never been found in the county.

Sutton & Beaumont, 1989: Still present at its best known Yorkshire locality, Bishop Wood (VC64). This species has now also been recorded from areas in the North York Moors and the north-east of VC64. These records are the furthest north in the east of the country in recent times, the species extending into Cumbria in the west (Skinner, 1984).

	Retained Specimen / Photograph will be Required.

Recorded in 25 (13%) of 200 10k Squares. First Recorded in 1846. Last Recorded in 2023. Additional Stats

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