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Access points during warmer weather, completion of life cycles and natural histories, intolerance of environmental conditions outside that mandated for the species, and use of pest-busting controls are reasons why dead flies can be found near windows in winter. The insects in question (Diptera order) come inside when needs such as food and shelter best can be met indoors than out. They have limited shelf lives, whose termination may be hastened by such human intervention as household-friendly insecticides.

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10y ago

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