Typical swarm locations
Collectors in Borehamwood regularly attend swarms in the mature lime and horse chestnut of Aldenham Country Park and its reservoir margins, in the garden trees and hedgerow shrubs of the Kenilworth and Elstree residential areas, along the Cowley Hill railway embankment hawthorn and elder scrub, and in the chimney stacks and loft spaces of the older inter-war and postwar semi-detached properties near the town centre.