A
couple of years ago I was walking on the top island at Rim Shoals moving from
one good fishing spot to another, when I looked down at a rock on the shore and
spotted the nymphal husk of stonefly. The stonefly is the largest of the
aquatic insects that inhabit trout streams. This nymphal husk is the
exoskeleton that the insect emerges from when it goes from the nymphal stage to
the adult stage during metamorphosis. This nymphal husk was huge. It measured
about an inch and a half long. Though stoneflies are important on many of our
local trout streams, I had never seen one on the White River. Since I only
found one shuck I discounted it as an aberration.
When
I first started fishing on the Spring River many years ago, the Entwhistle
Spring River Creeper, a local golden stonefly pattern developed by the late
Ralph Entwhistle, was the go to fly on the Spring River. I have caught many
trout using this fly and I still carry them. When I fished the Eleven Point
River with top Eleven Point guide, Brian Sloss, he had my wife, Lori, and I use
double stone fly rigs to great effect. When I fished the North Fork of the
White River Brian Wise, the best guide on that river, suggested that I use a
stonefly nymph with a prince dropper. It should be pointed out that Lori out
fished me that day with an olive woolly bugger. I did catch fish on the
stonefly nymph.
While
I have never actually seen a stonefly hatch around here, despite my spending a
lot of time on the water, I have observed some spectacular stonefly hatches out
west. My first encounter was on the Metolius River in Central Oregon about
twenty five years ago. The stoneflies were abundant and the trout were keying
in on them. I was able to land a couple of nice trout on a stonefly dry
pattern. It was a thrill seeing a fat fourteen inch rainbow rise to the surface
to slurp the huge fly. I ran into them again about ten years later. I was
staying in a magnificent log cabin in the Paradise Valley section of the
Yellowstone River in Montana. There were adult stoneflies all over the place.
Unfortunately the Yellowstone was swollen out of its banks due to a record
snowmelt and the trout did not key in on them at all. We ended up fishing the
gray drake hatch on Slough Creek. We still had a good time but we were not able
to fish the stonefly hatch.
A
couple of weeks ago I was again walking the bank of the upper island at Rim
Shoals. This time I was guiding two anglers and I was walking between the spots
they were fishing scouting out potential places to fish them. As I was passing
a tree at the end of the island, I noticed no less than two dozen stonefly
nymphal shucks on it. There had been a recent stonefly hatch there at Rim
Shoals.
Stoneflies
are different from other aquatic insects in trout streams in that their emergence
from the nymphal stage to the adult stage takes place on land rather than the
water. The nymphs will walk from the water to the shore where they will emerge.
As a result, you can find nymphal shucks on plants and rocks, where an
emergence has taken place. They return to the water to lay their eggs where
they become large tempting targets for hungry trout.
That
week I had a conversation with Bill Thorne at Dally’s Ozark Angler, a local fly
shop. He said that stoneflies had recently been seen in the Buffalo Shoals
section of the White River downstream of Rim Shoals. He even had a large adult
stonefly to show me that some angler had brought into the shop.
What
does all of this mean to us? It is obvious that we have stoneflies in the White
River. I know that the trout have to key in on these big bites. We should key
in on these insects ourselves. I for one am going to experiment with fishing
with stonefly nymphs and begin carrying the dry flies just in case I run into a
hatch. Let me know if you see any out there.
John
Berry is a fly fishing guide in Cotter, Arkansas and has fished our local
streams for over thirty years.