British studies have shown that hundreds of nests of sparrows, swallows, pigeons and jackdaws contain food pests. It is among others brown house moths, bacon beetles, yellow mealworm beetles, Australian spider beetles, drugstore beetles, silverfish, lesser house flies, flour mites and common house mites. The British conclusion that bird nests are breeding grounds for some of the pests that appear indoors probably fit the conditions of other similar countries. There is therefore good reason to avoid birds’ nests on and in buildings where food is stored for either short or long periods of time.
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