Mating March Flies

What is this bug? Please
Hello, Could you please tell me what these are? I live in California on the Central Coast and found these in my backyard. I have never seen these in my area and would like to know if they are harmful as they were mating. Thank You

Hi Maryann,
These are mating March Flies in the family Bibionidae. You can find more information on BugGuide which states: “Larvae feed on decaying organic matter, such as feces, roots, logs”, so they are actually beneficial. Some species, notably Love Bugs in Florida and the Southeast, can get very numerous at times and become a nuisance. The male has the bigger eyes and corresponding bigger head.

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