April & May are prime months for Callibaetis hatches on thousands of lakes throughout North America.

Speckle-winged quill nymph (Callibaetis sp.).

A Speckle-winged quill male dun (Callibaetis sp.).

When fishing during a Callibaetis hatch you will want patterns that imitate nymphs, emergers, duns, and spinners, and be ready to change quickly from one pattern to another during the course of the daily hatch.

Callibaetis patterns:

Top row (left to right) - Spinner & Harrop Dun

Bottom - Rowly’s emerger & Callibaetis nymph

A Speckle-winged quill male spinner (Callibaetis sp.).

Trout and lakes typically grow faster and larger than their moving water brothers and sisters, which makes for some very interesting fishing!

Cloudy and rainy days often produce some of the beast Callibaetis hatches, so don’t stay in camp when the rain comes!

A nice rainbow on a small dry fly - What rain!