Fished the Deerfield River on the evening of May 20, 2013. When I arrived just before 6, there was a prodigious flight of caddis flies over the water. Flying upstream, being blown back downstream, flying back up, in front of me, behind me, above me, and as the evening progressed, in increasing numbers below me, on the water surface.
The caddis were about a size 16. They appeared to have greyish-brown wings and green bodies. However I captured a few and saw that the bodies were tan. The green was coming from large egg sacs the females were carrying.
There were a few fish rising to those caddis that were hitting the water. At first, it was easy to get the fish to take my fly (not so easy to land them).
As darkness approached, the rises became more regular and the refusals more repetitive. I recall getting somewhat annoyed - at the fish, the bugs, myself at various times. But I took a few deep breaths, kept casiting, and overall it was a fine evening. Water temperature 67F, air about the same, no biting bugs, and I did land a few trout: brown, brook and rainbow.