Upper Delaware river insects, Stenacron canadense, Light Cahill, insect identification fly fishing.
Aquatic insect, Stenacron canadense, Light Cahill, insect identification, Delaware, river, fly fishing, identification, mayflies, caddisflies, stoneflies.
Stenacron canadense

Pronounced - sten ac cron - can uh den see

Common Name - Light Cahill

Size
Hook - 12, 14, 16
Millimeter - 9 to 11

Nymph
Body Color - Brown Amber
Tails - 3

Dun
Body Color - Light Tanish Yellow
Wing Color - Pale Yellow with Dark Brown Marks
Tails - 2

Spinner
Body Color - Pale Yellow
Wing Color - Clear
Tails - 2

   Like all other Stenacron interpunctatum (inter punk tate um) canadense nymphs are clingers preferring fast riffles. Like Stenonema, a freshly hatched Stenacron dun has black eyes that change color after exposure to light. Stenacron never hatch in great numbers, but will hatch sporadically though the day on cooler cloudy days. The majority of Stenacron hatches are concentrated on the lower east, west branch, and the main stem. It's rare to find Stenacron canadense in any number on the upper sections of the east, and west branch. Stenacron canadense range in color from almost white to pale yellow, and are almost identical to Stenonema ithaca except for their smaller size and lighter color. Although rarely found on the water in any great numbers canadense, especially the spinners are of major importance to the fly fisher hatching sporadically from mid June through August, and spinner falls through mid September. Spinners range in color from white to pale yellow.

Jerry Hadden's Guide Service

Fly fishing float trips for wild trout on the Upper Delaware River.

607-221-4282



Delaware River fly fishing with Jerry Hadden.