Tiny black flies that are attracted to human breath and the salty moisture around the eyes are swarming parts of the San Gabriel Valley, experts say.

Residents across the San Gabriel Valley are reporting an early surge of tiny black flies known for swarming faces and biting near the eyes, creating growing frustration as temperatures rise this season. The small insects, often active during warmer months, appear to have arrived earlier than usual this year. Many people say the flies gather around parks, sidewalks, hiking trails, and residential neighborhoods, especially during morning and evening hours.

Locals describe the pests as aggressive, with some flies targeting moisture around the eyes, nose, and mouth. While the bites are usually minor, they can cause irritation, redness, and discomfort.

Experts say warm weather, recent moisture, and breeding conditions may be contributing to the increase. Similar outbreaks have happened in Southern California before, particularly after mild winters or rainy periods.

Residents are being advised to wear sunglasses, use insect repellent when outdoors, and avoid standing water near homes where insects may breed. Covering skin and limiting outdoor activity during peak swarm times may also help.

Officials have not announced any major health threat linked to the flies, but many residents are hoping pest activity decreases as the season continues.

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