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Flies again. This is a longshot for this list, but does anyone remember seeing or hearing of any species of fly which has refective patches on the wings? Many species have dark patches or stripes but that's not it, I mean reflective, like some of the scales on some lepidopteran wings. The elegant dolochopodid sea-cliff fly mentioned earlier, identified now as Liancalus genualis, is still present as of 3 October on the cliffs west of Hall's Harbour. The male has small reflective "eyespots" on the wing tips that are thought to be used in sex signalling by "flashing" females. I'm interested if any other flies have anything similarly reflective, and also if anyone has looked into the mechanism of reflectivity. Flies don't have wing scales, only bristles as far as I know, so it's not clear how they could do it, yet they do. Has anyone encountered any info on this? -- please let me know if you have anything. Steve --
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