Movement and Distribution of House Flies (Diptera: Muscidae) Between Habitats in Two Livestock Farms

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Abstract
House fly, Musca domestica L., movement between breeding sites (dairies and poultry houses) and into surrounding habitats (buildings, fields, and pastures) was measured by releasing marked flies in poultry houses and dairies at two farms. Relative density of wild and marked flies was greater in the dairy and poultry houses than in other habitats at similar distances from the release areas. Calculated proportions of wild flies in each habitat were greatest in the dairies and poultry houses; averages of 25 and 36% of the wild populations were estimated to be in the other habitats. After 5 days, an average of 60 and 53% of marked flies released in the poultry houses remained there, 13% moved to the dairies at both farms, and 27 and 34% moved from the poultry houses to the non breeding habitats. An average of 56 and 73% of the marked flies released in the dairies remained there after 5 days, while 8 and 10% moved into the poultry houses, and 34 and 19% moved from the dairies into the nonbreeding habitats at both farms.

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