778d28a0141bff0ad1a17f79bdf23bf9

A group of stilt-legged flies (Rainieria antennaepes), apparently all females, was walking about and ovipositing on a large fallen log. They stop periodically to wave their forelegs, which are marked with white. I think this might be a defensive display, as it resembles the waving antennae of a wasp, but I can find no references on that--it appears to be my own idea. (Well, of course, Thomas Say named this species antennaepes in 1823, and that means "antennae-foot"! I can't find where anyone has mentioned that this is mimicry, specifically.)  -BugGuide account--Rainieria antennaepes