If you are looking for general hatch information check out the chart below and the write-up below that. Check out our Midge page . Often known to hatch in poor weather conditions. Actually several species grouped together. Size range 14-18.
Color ranges from dark olive to bright green.
When in doubt try one. I do not profess to know a lot about aquatic insects. Most of what you find here is taken from my field notes and they are vague at best. If you think some important insects are left out, let me know. If you feel some of the dates are wrong, let me know.