Typical swarm locations
Collectors regularly attend swarms on the lime and sycamore of the Minster churchyard and Market Place, along the River Ouse and Hook Drain willow and elder scrub towards Skelton and Asselby Island, in the field hedgerows and farm gardens of the Humber floodplain between Howden and Eastrington, and in the eaves and chimney stacks of the older brick town-centre properties and surrounding Ouse-side farmsteads.