Acroceridae: Ogcodes sp. - Hunchback Fly
Note: 3rd shot is a different specimen with a slightly larger head; different sex?
Nov22 Cass Malaise 1 braided river project
Many taking nectar from Spring blossoms in Halswell Domain on warm sunny day
NOT bioluminescencing - just UV. If I could get both happening in the same photo I bet that would be something. Though not sure about the slime on the rock that's fluorescencing bright magenta.