Male Small House Flies form swarms in the summer. Females lay their eggs in animal/human feces or on dead and decaying animal tissue. For this reason, one species (F. scalaris) is also known as the Latrine Fly and is considered a potential harbinger of disease because after landing on feces, they land on food as well.
Though they are half the size and much thinner than a normal House Fly (Musca domestica), the Small House Fly shares similar traits. The life cycle of F. scalaris is well-known and the maggots (larvae) develop on feces or decaying tissue. Forensic scientists use this knowledge to gauge the amount of time a corpse has been decomposing. Identifying which part of the life cycle the maggots/flies are in when they are found on a body helps calculate when the person died.
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