Pale Morning Dun

(body length approx 0.4-0.5 cm)

This is a lousy photograph of an ephemerella nymph in an earlier instar than those below... It was probably taken in March sometime.

(body length approx 0.8 cm)

These were grabbed very soon before hatching (late May). Notice how the wingcases are more yellow. The adults happen to have light colored wings.

The adults were captured when they hatched the evening of May 27. PMD's on the McKenzie don't always hatch in the morning like the name suggests, but at various times during the day, especially sundown. The common name probably came about from their similarity to an East Coast species...

This is a fun hatch to fish after work in late spring...

dmason@zebu.uoregon.edu