About Coptotriche marginea (Haworth, 1828)
Coptotriche marginea (Haworth, 1828) has an adult wingspan of 7–8 mm. Adults are brownish with a faint metallic sheen. Their forewings are ochreous-yellow; the costa is narrowly dark purplish-fuscous towards the anterior end, and broadly suffused with the same colour towards the posterior end. The termen is also suffused with dark purplish-fuscous, with an additional dark fuscous tornal dot. Hindwings are a moderately dark grey. Adults are active on wing from May to June, with a second generation in August. Females lay eggs on the upper surface of bramble leaves, most commonly those of Rubus fruticosus. The larvae of Coptotriche marginea feed on a range of Rubus species: European dewberry (Rubus caesius), Rubus canescens, Armenian blackberry (Rubus armeniacus), blackberry (Rubus fruticosus), Rubus grabowskii, Rubus hypargyrus, raspberry (Rubus idaeus), evergreen blackberry (Rubus laciniatus), Rubus macrophyllus, Rubus nemorosus, and stone bramble (Rubus saxatilis). Larvae create leaf mines inside the leaves of their host plants. Mines containing larvae can be found in June, and again from September to March. Pupation occurs inside the leaf mine, and the pupa is not enclosed in a cocoon.
