Written By - Troutnut - 05/23/2007
Link to Original Article here

As I prepared to set foot for the first time in the Catskills' storied Esopus Creek, I noticed an Isonychia bicolor nymph crawling out onto a rock at my feet. I pulled out my handy little camera and started snapping pictures.

This process isn't as interesting to fly fishers as the emergence of a dun from a nymph on the water's surface. This is a point in the mayfly's development at which it's temporarily safe from the trout, but it's interesting to watch up close anyway.