Small flies swarming in Moraga are there for a reason
Briefly

The article addresses an ongoing issue with pesky gnats, identified as lesser house flies. These flies are typically found in shady, calm spots and are more common during warmer months. The article suggests environmental changes instead of insecticides, such as eliminating damp areas that attract females for laying eggs and modifying watering habits to prevent excess moisture. It also highlights that using a fan can effectively disperse the flies. These strategies provide temporary relief and enhance outdoor enjoyment during peak fly seasons.
The swarm of circling flies are males, waiting for an unmated female to fly by. Because the lesser house fly is not as tolerant to heat or sun, they choose shady, cooler spots to hang out, and places where the air is still.
Changing the conditions on your patio is key to managing lesser house flies. Look for damp, protected areas where females lay eggs and adjust your watering schedule.
Placing a fan on your porch, directed toward the swarm, can effectively disperse the flies and provide temporary relief from their annoyance.
While sprays are usually ineffective against lesser house flies, altering the environment can reduce their presence significantly, especially during peak seasons.
Read at www.mercurynews.com
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