{"id":14482,"date":"2025-08-12T09:20:34","date_gmt":"2025-08-12T09:20:34","guid":{"rendered":"https:\/\/www.prokill.co.uk\/blog?p=14482"},"modified":"2025-09-22T18:13:26","modified_gmt":"2025-09-22T18:13:26","slug":"time-year-cluster-flies-appear","status":"publish","type":"post","link":"https:\/\/www.prokill.co.uk\/blog\/time-year-cluster-flies-appear\/","title":{"rendered":"What time of year do cluster flies appear?"},"content":{"rendered":"

As the weather starts to warm up, it\u2019s inevitable that we\u2019re going to see more flies. Even though they\u2019re a complete nuisance and we don\u2019t want them near our food, most of us aren\u2019t that bothered about the presence of the odd one or two.<\/p>\n

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Cluster flies<\/a> on the other hand can be a different story. These insects tend to gather in large numbers which means an infestation is more likely and can be a bit scary, not to mention problematic.<\/p>\n

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Even though they like to make their way into our homes during late autumn, you\u2019re unlikely to see them because they hibernate throughout winter. As the sunny spring days roll around however, they come out of hibernation. Cluster flies<\/a> do sometimes mistakenly come out of hibernation early because of the central heating in our homes.<\/p>\n

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Because cluster flies gather in such large numbers, if you do have an infestation, you\u2019re likely to be swarmed with them.<\/p>\n

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What do cluster flies look like?<\/strong>\u00a0<\/strong><\/h4>\n

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Cluster flies are large and black and are very similar to house flies. It can be difficult to spot the difference between them because they tend to fly away as soon as you get near.<\/p>\n

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If you can get close or you spot any dead flies, have a close look before disposing of them. Cluster flies have yellowish golden hairs on their thorax and a prominent dark and light coloured chequered pattern on their abdomen. At rest, both wings overlap across the abdomen and physically, they tend to be slow and sluggish.<\/p>\n

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What are the signs of an infestation?<\/strong><\/h4>\n

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Because cluster flies are usually found in quiet, undisturbed parts of the home, it can be very difficult to know you have an infestation. Below are some of the more common signs they\u2019re present however:<\/p>\n

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