Hibernating pests and why they pose a problem - PEST UK

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Hibernating pests and why they pose a problem

In Pests

Hibernating pests and why they pose a problem

As Winter approaches and the cold weather sets in, a number of pests seek out the warmth and dryness of our homes for ‘hibernation’, or diapause – a dormant state of development in which growth and activity of an insect is suspended. Here are some of the most common hibernating pests that can be found during these cold months:


Cluster flies

Cluster flies, named due to the fact they congregate together en masse, seek refuge in cold weather. As a result, they can find their way into attic spaces and similar areas indoors. They hibernate in large groups, reemerging in the Spring to lay eggs. However, the warmth and dryness of our temperature-regulated homes can often trick them into thinking Spring has arrived early and come out from hibernation. While harmless to human health, they can be a nuisance. Hibernating cluster flies can also leave behind excrement which can stain walls, furnishings and fabrics.


Many species of beetles hibernate during the cold months. In the wild, beetles seek out the warmth and safety of fallen leaves, loose bark or other debris to burrow under for hibernation. Cold, wet weather makes them increasingly attracted to our cosy homes to seek shelter. If an infestation is untreated, beetles can cause significant damage, and their rapid rate of breeding means that even a small population can get out of control fairly quickly.


Woodworm is the wood-eating larvae of many species of beetle. Therefore, while the hibernating beetles in your home may not pose a problem, their immature free-living form could be destroying your furniture. Signs of woodworm include exit holes and tunnels in wood; “Frass” – a fine powdery sawdust which woodworm beetles leave behind; damaged, weak or crumbling wood; and the presence of live or dead adult beetles.


If you think you may have an infestation or would like some advice, call us on 0330 100 2811 or email at services@pestuk.com


PESTUK have offices in Bracknell, Edgware, Salisbury, St Albans, Stevenage, Swindon, Thame, Wantage, Ware, Watford, and Woking.

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