Typical swarm locations
Collectors in Grays are most often called to the Victorian and inter-war terraced streets around the town centre, to the roof voids and chimney pots of the older properties along the High Street and New Road, to the garden trees of the residential streets behind the shopping centre, and to the Thames-side vegetation along the river path. The chalk-scarp gardens on the hill above the town warm up quickly in May and produce early swarms in good springs.