Typical swarm locations
Forder Valley Local Nature Reserve ash, hazel and elder on the stream-valley slopes produce spring swarms from late April. Tamar Valley riverside hawthorn and sycamore scrub at Warleigh and Blaxton attracts clusters in May. Post-war residential garden boundary elder and ornamental cherry in Honicknowle Lane and Bingham Road are regular swarm sites in June. Roof voids in the 1950s-60s estate housing of Ham Drive are among the most frequently reported cavity swarm locations.