Last modified: April 23, 2019, 12:44 p.m.
A species which arrived in 1989 in Belgium, but which is now widespread and not uncommon.
See also bladmineerders.be
One generation a year from late April till early July.
The larva lives on Juniperus spp. and Thuja spp., also cultivars and the species has spread with planting of those trees in gardens.