March Brown CDC Emerger
Not always on the water, but when they are, the fish are always biting.
Emerger patterns are ideal during the early stages of a hatch when the insect emergence has not yet fully started, but the presence is felt.
Dressed with CDC, this pattern floats with the body only partially submerged, creating the appearance of an insect about to emerge from the water and into the air.
This action triggers a strong strike response in fish, giving them the impression that the opportunity to catch the insect is fleeting.
March Browns include species such as Rithrogena Germanica, Stenonema Vicarium, and Rhithrogena morrisoni, all commonly found in early spring fly hatches.
| Species | Common Name |
|---|---|
| Rithrogena Germanica | March Brown |
| Stenonema Vicarium | March Brown |
| Rhithrogena morrisoni | March Brown |
FAQ
What time of day is best to use this fly?
This fly works well during early morning or late afternoon when the hatch has not yet fully started but the presence of insects is noticeable.
How does the CDC affect the fly’s behavior in the water?
The CDC provides a floating action that mimics an insect about to emerge from the water, creating a natural movement that triggers a strike response in fish.
Are March Browns active in all seasons?
March Browns are primarily active in early spring, especially during the transition period when the hatch begins but has not yet reached full intensity.

Eric Brown –
This fly worked perfectly during a soft morning hatch. The CDC gave it a natural floating action that made fish strike consistently. I caught several trout within the first 20 minutes of casting.
Jason Glover –
Great for early season fishing when the hatch is just starting. The emergence look is realistic and fish respond well. A bit more sensitive than standard patterns, but worth it.
Joseph Skinner –
Used it during a March hatch and saw multiple strikes. The way it floats just above the water surface is very convincing. Fish seemed to react as if the insect was about to fly away.