Parornix devoniella

Wingspan 9 to 10 mm. All the Parornix species have a distinctive resting posture with the front part of the body raised on the forelegs, and a slightly upcurved rear. The larva mines the leaves of Hazel, initially creating a squarish or triangular tentiform mine on the underside, and then folding over the edge of the same leaf, or one nearby.  In common with other Parornix larvae, the larva is whitish with 4 black spots on the pronotum

Mines can look like Phyllonorycter nicellii; if in doubt check larvae

Adult Leafmine

Photograph the mine, upper and lower side, and leaf-fold; if possible photograph larva.  Note host species.

Wherever Hazel is plentiful.

The moths fly in two generations, firstly in May and again in August.

The larvae of this species feed on Hazel (Corylus avellana)

The species is relatively common wherever its foodplant is found. In the Butterfly Conservation's Microlepidoptera Report 2011 this species was classified as common.

It appears to be uncommon in Leicestershire and Rutland, where there are few records. L&R Moth Group status = D (rare or rarely recorded).

http://www.leafmines.co.uk/html/Lepidoptera/P.devoniella1.htm

https://bladmineerders.nl/parasites/animalia/arthropoda/insecta/lepidoptera/ditrysia/gracillarioidea/gracillariidae/gracillariinae/parornix/parornix-devoniella/