In late June the Halifax SS had an outing to Crow Nest quarry and Bruce Hoyle recorded a Marbed White butterfly which is a first for Calderdale .
The plant diversity at Crow Nest Quarry indicates lime in the soil as a result of the
tipping, so maybe the Marbled white was attracted to the vegetation. There was a
hot easterly breeze that day. Brian Cain says he associates this butterfly with wild
scabious in E. Yorkshire. The other site he can remember wild scabious in
Calderdale is Clifton Lagoons, so maybe worth looking there if the weather
conditions/ emergence times coincide again.
Many thanks to Bruce,Brian C and Steve Blacksmith for this information.