A European geometrid moth, Epirrita christyi, with variable grey to dark brown mottled wings (scarcely distinguishable from the November moth, E. dilutata).
Origin
1950s.
Definition of pale November moth in US English:
pale November moth
noun
A European geometrid moth, Epirrita christyi, with variable grey to dark brown mottled wings (scarcely distinguishable from the November moth, E. dilutata).