The House Fly is the world's most familiar fly, a cosmopolitan synanthropic species that has lived alongside humans for thousands of years. Its mouthparts are sponge-like, dissolving food with saliva before lapping it up, making it a significant disease vector as it moves between refuse and food sources. It can complete a generation in as little as two weeks in warm conditions.
Best time to see a House Fly
The best time to see a House Fly is June–October, when about 65% of U.S. sightings happen, based on 1,706 research-grade iNaturalist observations.
Not certain it is a House Fly? What bug is this? walks through what to check first and the lookalikes that catch people out.
Recent House Fly sightings near you
Live, research-grade observations from iNaturalist. Allow location to center the map on you.
Spotted a House Fly?
Point Huck at any plant, bird, or animal and know for sure - plus a live map of where it is being spotted near you.