Typical swarm locations
Woolwich collectors attend swarms in the mature parkland trees of the Royal Arsenal heritage site, along the riverside bramble and hawthorn scrub of the Thames Path between Woolwich Ferry and Crossness, in the older chimney pots and Victorian terrace roof voids of Plumstead and Woolwich Common, and in the rough grassland and scrub of the Thamesmead green spaces towards the Erith marshes.