Insects and other foods the trout may be eating:
1.    Blue-winged Olives
2.    Little Short Horned Sedges
3.    American March Browns
4.    Cinnamon Sedges (Caddisflies) (Abrams Creek)
5.    Green Sedges (Caddisflies)
6.    Little Sister Caddisflies (Abrams Creek)
7.    Pale Evening Duns
8.    Little Yellow Stoneflies -Yellow Sallies
9.    Eastern Green Drakes (Abrams Creek)
10.  Giant Stoneflies
11.  Light Cahills
12.  Sculpin, baitfish and small crayfish (Imitate with streamers)
13.  Midges

Little Yellow Stoneflies - Yellow Sally - Adult
I think the Little Yellow Stonefly hatches bring about the best dry fly fishing of any
eastern stonefly hatch. During the daylight hours you can often catch trout feeding
on the egg laying adults. Most other stoneflies lay their eggs in the evenings. The
Little Yellow species do also, but their activity starts much earlier in the day before
dark. Of course the different species of stoneflies called Yellow Sallies may do their
egg laying differently, not so much because they are a different species, but
because the time of year when the hatch occurs.

Normally, the egg laying females will start depositing their eggs about the time the
sun sets. On cloudy days, they usually start earlier. The park rules say the fishing
hours ends at 30 minutes after official sunset, so that doesn't leave much time to
fish on bright, clear days. Even so, you can normally catch a good number of trout
during a very short time. This all depends on the weather and water temperatures.
Right now the egg laying takes place earlier in the day. During the hot summer, the
egg laying activity will start later in the day.

It is easy to determine when to start fishing an imitation of the adult. You will see the
flies dipping down to the surface to drop their eggs. You may also see the trout
crashing them on top of the water. The reason it isn't always so noticeable that the
trout are eating the egg layers is because sometimes when the first egg layers start
dropping their eggs, the hatch is still in progress. Depending on the length of the
hatch, the nymphs may still be crawling out of the water in the evenings to hatch. In
that event they will also be migrating from the fast water to the banks during the late
afternoon. When the hatch is still in progress and the egg laying has also started
from earlier hatches, the nymph is still by far the most productive imitation to use. It
is much easier for the trout to eat the migrating nymphs than it is the egg layers.
However, many anglers, including myself, rather fish the dry fly and get in on the
surface action even though it probably means less numbers of trout will be caught.

Determining where to place your dry fly imitation of the adult is also easy. You just
place it where you see the most activity on the water. The females usually deposit
their eggs in the same water they hatched from.
Little Yellow Stonefly Adult  - Yellow Sally
Our "Perfect Fly" Little Yellow Stonefly Adult fly. This fly has a foam body that floats
high on the surface even in fast water. It looks very much like the real flies from the
bottom view the trout gets. The legs and antennae bend and flex easily, returning
to the same position. The wings are made from Raffia.