Helping to keep down the insect pest population that I won't want on my potted plants.

One of about a dozen I saw today, here and there.
Size: Tiny: About 2–5 mm in body length
Color: Metallic sheen giving them a gem-like appearance

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Long-legged flies (family Dolichopodidae) stand out as beneficial predators, often overlooked yet vital contributors to natural pest control. https://peskylittlecritters.com/how-long-legged-flies-contribute-to-natural-pest-control/