Typical swarm locations
Collectors here attend swarms along the Colne Valley riverside willows and gravel-pit scrub margins between Iver and Denham, in the mature churchyard limes and garden trees of St Peter's and the older village cottages on the High Street and Church Road, in the hawthorn and bramble hedgerows of the old market-garden lanes east toward Thorney Mill, and in the roof voids and eaves of the 1930s and post-war housing in Iver Village and Richings Park.