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Extension > Garden > Diagnose a problem > What insect is this? > Insects found indoors > Winged Insects - 1/4 inch up to 1/2 inch > House fly

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House fly

Musca domestica


Jeff Hahn, University of Minnesota


Jeff Hahn, University of Minnesota

Size: 1/6 - 1/4 inch long

Description: Dull gray flies; 4 narrow, black longitudinal stripes on thorax; sides of abdomen usually pale.

Where/When: Found in and around buildings during the summer.

Significance: House flies can be a nuisance when they gather on the outside walls of homes and buildings in large numbers. They are associated with waste and decaying matter and can potentially be a vector of disease-causing bacteria. House flies do not bite.

More information on House flies...

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