The Clouded August Thorn (Ennomos quercaria) is a species of moth in the Geometridae family.
This species is similar to the August Thorn, but is smaller, more speckled, and duller. The wings are held at right angles to each other, and the edge is scalloped. The wings are a dull yellow in colour.
This species is a rare vagrant to Britain, with 2 records, though these are old and have little details. This species is local in southern Europe.