Pale Morning Dun

Life Cycle = egg, larva, sub-imago, adult

PMDadult.jpg (14952 bytes)
Spent PMD Adult, Working on more pictures...

Size/Profile Larva (nymph):  10 - 20 mm (flat tapered body with distinct wing case and long split tail))
Adult/Sub-Imago:  10 - 20mm (tapered body with two large gray wings standing upright with a slight tilt back and a long split tail)

Note: tails are typically as long as the body.

Colors Larva (nymph): top is a light reddish/pink, bottom is cream, wing case is typically brown.
Adult/Sub-Imago: top is light yellow/olive, bottom is creamy yellow.  Wing is gray.
Action Larva: crawl on the bottom but swim frantically when rising to the surface to emerge.
Adult: Most of the time very still on the surface of the water as the wings dry.  Females skim water and dip occasionally to deposit eggs.
Habitat PMDs are often found in faster moving water where more oxygen is present.  They breathe through gills on their abdomen and eat aquatic plants.  They prefer warmer water than the midges.  As such, they are found in greater numbers downstream of the Texas Hole and are more prolific as you reach the lower stretches of the quality water.
Notes PMD nymph patterns are productive fished near the bottom early right before the typical hatch times (around 11am or so) and in between hatches throughout the afternoon.  Fish tend to key in on the PMDs just as they reach the surface and begin to emerge and are helpless and still.  When hatches are significant, the fish may key in on the adult stage.  Hatches are best in July and and are especially good during overcast conditions.  Fish will also take spent adults on the surface during a good hatch. 
Fly Patterns
  • Strawberry PT (16-18)
  • Strawberry Hares ear (16-18)
  • Light Olive RS-2 with CDC wing (16-18)
  • PMD Thorax (16-20)
  • Extended Body PMD (16-20)

Select the Fly Patterns link  for recipes and pictures of the patterns.