Insects and other foods the trout may be eating:
1.    Blue-winged Olives
2  .  Sculpin, baitfish and small crayfish (Imitate with streamers)
3.    Little Brown Stoneflies
4.    Quill Gordons
5.    Blue Quills
6.    Little Black Caddis
9.    Hendricksons and the Red Quills

The Basics of Fly Fishing Series - The Wiggle Cast, Snake Cast, or
Crooked Cast
A useful crooked cast to create slack in the line and leader is the wiggle cast. You
wiggle the tip of the rod on the forward cast to create curves in the line. It works best
when you shoot some line. This just adds some slack in the line to help achieve a
drag free drift in situations where a straightened out fly line lands in current that
would instantly drag your fly.

A wiggle or snake cast is really very easy to make but it's not exactly easy to control
the accuracy of the cast. If you have to hit a precise point, it's difficult to do that with
a wiggle cast. The wiggle cast is also called a Snake cast because your fly line
lands on the water in the shape of a snake best described as a series of "S" curves.
Some anglers, including me, just call it a crooked cast.

You just make a regular overhead cast like you normally would but as your making
the forward power stroke part of the cast, shoot a few feet of line at the same time
you wiggle the tip of the rod. Lower the rod at the end of the shoot such that the line
falls on the water with some "S" curves in it.  

The later you wait to wiggle the rod, the closer the curves will be to the rod. The
earlier you wiggle the rod, the farther the curves will be from the rod. Wiggle quickly
to place them near the end of the line or delay the wiggle slightly to place them near
the rod. I prefer the curves end up near the end of the line when I'm making  
upstream presentations. I prefer them closer to the rod (further from the fly) when
I'm making downstream presentations.

The wider the wiggles, the wider the "S" curves. The narrower the wiggles, the
narrow the "S" curves.

Hendrickson Hatch - Spinners
The highlight of a Hendrickson hatch is the spinner fall. This normally occurs near
dark but it can begin much earlier in the afternoon on cloudy, heavily overcast days.
The first of the spinner fall consist of the males or Red Quills. Shortly thereafter the
females, or Hendrickson spinners will begin to deposit their eggs. As soon as they
do, they too fall on the water in a spent position. Both the Red Quill spinners and
the Hendrickson spinners die in a very short time. This entire deal takes place in
about an hour or less. You can often catch several trout in a very short time.

These mayflies fall on the same water they hatched from. There can be a lot of
spinners on the water at the same time and in a relatively small area. The fish
usually find the current seams and remain in one position feeding on the spinners
drifting helplessly downstream. If the spinner fall is heavy, the trout will develop a
rhythm feeding on them.

Start out using an imitation of the male or Red Quill spinner.  When the action
slows down or when you begin to see some females or Hendrickson spinners,
change to an imitation of the female. The trout just sip the spinners in. They leave
only a small rise ring and in low light situations it is often impossible to see them
eating the spinners. It's also rare you can spot the spinners on the water. You
should keep continuous checks overhead for them late in the afternoon. You can
normally spot the spinners in the air provided you look up occasionally to check for
them. Depending on the lighting situation, you can also spot the female spinners
skimming across the surface of the water, dipping down to drop their eggs.

Sometimes downstream presentations are necessary to keep from spooking the
trout that are feeding on the spinners. This usually happens where the water is fairly
smooth and it often is near the ends of the pools. They also feed on these spinners
at the very ends of the long runs and riffles in situations where the water slows down
but it mostly occurs at the tail ends of the pools.

2011 James Marsh
That's the Perfect Fly Red Quill Spinner (male) above. It has three split mono tails,  
goose biot body, dubbed thorax, mottled turkey quill wing case, soft hackle legs,
and hen feather wings that turn almost translucent when wet.

The Hendrickson spinner (female) below is made of the same materials. As you can
see, it is a completely different looking mayfly.