Nine thousand, six hundred and ninety-one flies of the family Muscidae (47 species) and Anthomyiidae (2 species) were captured. Flies were collected in three ecologically distinct areas (urban, rural and forest) within the metropolitan region of the city of Rio de Janeiro using as baits decomposing fish, bovine liver, fresh human faeces and mashed banana with sugar. Fish attracted the highest number of flies all over the year. Large number of flies were always collected in the summer and spring but reduced in the winter. Among several species of flies, Atherigona orientalis Schiner, 1868, Musca domestica Linnaeus, 1758 and Synthesiomya nudiseta (Wulp, 1883) were always frequent.
Diptera; Muscidae; Anthomyiidae; atractivity; sazonality