Typical swarm locations
Collectors in Irthlingborough regularly attend swarms in the riverside willows and watermeadow scrub of the Nene flood plain at Nene Valley Lakes, in the older garden hedgerows and mature apple trees of the High Street and College Street conservation area, in the bramble and elder margins of former ironstone workings on the valley sides, and in chimney pots and eaves of the older red-brick terrace properties.