Ephemerella excrucians, PMD’s, look for them for the next four weeks!

PMDs find gentle to moderate currents over a gravel bottom or aquatic plants much to their liking.

These two nymphs were collected off of the same rock.  Both are PMDs and show the range of color variation possible.

Just like the nymphs PMD duns very considerably in color.  The specimen above and the one below - both PMD duns -  were collected from the same eddy within a couple minutes of each other.

Rainbows and browns are get equally excited when B.o. are emerging.  Remember to not strike too hard when setting the hook, especially on a large trout.

Patterns for the Mother’s Day caddis should include larva, pupa, and adult, though this time of year the larva pattern will be of little value.

Many  PMDs  leave their nymphal exoskeleton underwater and the dun makes its way to the surface.  Once through the surface film the wings still must unfold and dry before flight (above).  One result is a lot of duns left crippled on the surface (see below).