Norfolk status Difficult to distinguish from the recently separated C. robustella
please record undetermined specimens as the aggregate Caloptilia alchimiella/robustella
Leaf-mine: July - Oct. Narrow gallery leading to a squarish or triangular blotch. Then forms up to three successive cones by folding the lobe of a leaf downwards. Note: You cannot separate these from C. robustella unless you examine the pupa or breed out.
Determination by Genitalia Examination (gen. det.) Required
Mine: Moth needs to be reared and, in some cases, possibly dissected.
Recorded in 18 (26%) of 69 10k Squares. First Recorded in 1874. Last Recorded in 2020. Additional Stats