Cluster flies returning to Cheshire and Warrington homes for hibernation

Summarised from 2 outlets · Updated 15 Oct, 10:32 · Archive

Cluster flies are gathering in attics and roof spaces across Cheshire and Warrington as temperatures drop, with experts warning they may return year after year.

Cluster flies are gathering in large numbers in attics and roof spaces across Cheshire and Warrington as temperatures drop. The insects, which are around 8mm long, dark grey with yellow-coloured hairs and distinct stripes behind the head, seek sheltered spots to hibernate in autumn and may emerge again in spring.

Natalie Bungay, head of membership and technical at the British Pest Control Association, said: 'A mass of cluster flies are a nuisance in the house, especially in large numbers, and as they may also return to the same location year after year, they can become a recurring issue.' Unlike many other fly species, cluster flies do not pose a contamination risk as they do not lay eggs in human food. Female cluster flies instead lay their eggs on the soil surface, where the larvae burrow into the ground seeking earthworms.

Small infestations can often be managed with household methods such as vacuuming or aerosol fly killers. However, the BPCA recommends professional intervention from one of its members for heavy infestations, who may use insecticidal treatment to solve the problem.

How it is being reported

• Warrington homeowners warned of flies invading attics as temperatures dropWarrington homeowners are being warned about cluster flies gathering in attics and roof spaces as colder weather arrives, with experts offering advice on tackling infestationsWarrington Guardian · 15 Oct, 09:53
• Homeowners warned cluster flies may return to Cheshire homes year after yearHomeowners in Cheshire warned cluster flies are returning to attics this autumn. BPCA explains prevention, risks and when professional pest control is needed.Chester Standard · 14 Oct, 05:00

In this story: British Pest Control Association · Cheshire · Warrington · Natalie Bungay

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