The Marsh Crane Fly is a large, long-legged fly often mistaken for a 'giant mosquito,' though it is completely harmless to humans and does not bite. Its larvae (leatherjackets) live in soil and turf, feeding on plant roots and causing damage to lawns and crops. Adults are clumsy fliers attracted to lights at night and are short-lived.
Best time to see a Marsh Crane Fly
The best time to see a Marsh Crane Fly is February–May, when about 62% of U.S. sightings happen, based on 4,235 research-grade iNaturalist observations.
Not certain it is a Marsh Crane Fly? What bug is this? walks through what to check first and the lookalikes that catch people out.
Recent Marsh Crane Fly sightings near you
Live, research-grade observations from iNaturalist. Allow location to center the map on you.
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