....................... ......Fly Fishing Yellowstone National Park
Fly Fishing Yellowstone - Small Western Green Drakes (Flavs) -Emerger
The nymphs of the Small Western Green Drakes swim to the surface of the water to hatch into duns. The shuck splits open and the duns emerge in the surface skim. During this time, they are easily eaten by trout. They are completely helpless. These mayflies emerge for only an hour or so during clear, bright days. Like many mayflies, the hatch tends to last much longer if it is a cloudy or overcast day.
Presentation: It is best to fish an imitation of the nymph up until you see the first dun come off the water. At that time, I suggest you try either our "Perfect Fly" Emerger or our Emerger with Trailing Shuck fly. Both flies float with their CDC wing suspended in the surface skim. The Emerger imitates the nymph when the dun first starts to come out of the shuck. The Emerger with Trailing Shuck imitates the dun when the nymphal shuck is still attached to its tail.
You can use an up and across presentation in the pocket water streams allowing the fly to swing from the bottom to the surface. In smooth streams you may use a down and across presentation again, allowing the fly to swing to the surface.