Typical swarm locations
Collectors attend swarms in the North Esk gorge sycamore and beech woodland at Polton and Lasswade Old Church, on the hawthorn and bramble of the sunny east-facing riverbank slopes, on the Hawthornden estate lime and horse chestnut above the gorge, and in the stone eave and chimney voids of the older mill and estate cottages along Lasswade Road.