Food Plant: Acer pseudoplatanus (Sycamore)

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. The moth emerged 10.ix.2020. 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.

Data: 20.viii.2020, Downham Market, Norfolk, VC28

Image:© Rob Edmunds