Food Plant: Acer pseudoplatanus (Sycamore) Elsewhere: also on Acer campestre (Field Maple), Acer platanoides (Norway Maple), Acer saccharinum (Sliver Maple)

Egg: Underside of leaf, usually near midrib

Mine: June-July; August-September

Pupa: In a yellowish cocoon on underside of leaf

Notes: At first in a very small triangular whitish to brown blotch in the angle between veins under the leaf. Then forms three progressively larger cones at the tip of a leaf lobe; sometimes all in the same leaf. Caloptilia honoratella (recently discovered in the UK) makes similar mines in late summer but at first a small initial irregular silvery blotch is made on the upperside of the leaf and this enables separation of the two species.

National Status: Common

Bradley No: 284

Data: 07.vii.2002, Fleet, Hants, VC12

Image:© Rob Edmunds

References:
Plant C, (2022), The Status of Caloptilia honoratella (Rebel, 1914) and Caloptilia hemidactylella ([Denis & Schiffermüller}, 1774) in Britain with a note on two similar additional Acer-feeding Caloptilia that might appear in Britain (Lep,; Gracillariidae). Entomologist's Rec. J. Var. 134;1, 21-39