Typical swarm locations
Castleford collectors attend swarms in the riverside willow and alder carr of the Aire-Calder confluence at Redhill and Bulholme Lock, in the bramble and rosebay willowherb of the reclaimed colliery land east of the town, in the lime-lined streets and garden boundaries of the older residential areas around Carlton Street and Smawthorne Lane, and in the chimney pots and Victorian terrace roof voids of the older streets near the town centre.