This is an effective caddis that utilizes Hungarian Partridge fibers for legs.  The Bird of Prey Caddis is intended to represent both the caddis pupa and emerger stages, and variations are discussed in this tutorial.  When John Anderson created this pattern, he kept everything simple, easily one of the reasons this fly works so well!   

The Partridge and Orange is a traditional soft hackle that still works very effectively today.  The pattern, utilizing silk thread for a body, can represent many insects, including caddisflies and various mayflies.  I like to fish this as a dropper tied above my blood knot connection for the tippet.  

Categorized as a "guide fly" because it takes such a short amount of time to tie this pattern, the Sulphur Soft Hackle is an effective fly to catch trout on during a hatch.  I recommend fishing this pattern with a split shot at the beginning of the hatch, eventually drying it and fishing the Sulphur Soft Hackle on the surface as the fish begin to feed on emergers and duns.  This is also a great fly to swing, with great strikes from fish!

The Barr Emerger, create by John Barr, is an effective pattern that I use prior to the full emergence during a hatch.  This specific fly is meant to imitate the Baetis, or Blue-Winged Olive (BWO), and you can vary the colors to represent other mayflies during their emergence.

This simple pattern, developed by Craig Mathews of Blue Ribbon Flies, does an excellent job representing the emerger stage of caddisflies, primarily due to the trailing shuck.  This can also represent a crippled caddis, thus making it an effective fly to fish throughout a caddis emergence.

During a hatch of Sulphur mayflies, a great fly to fish is an emerger, which sits in the film.  By tying this pattern parachute-style, the fly rests within that surface film, plus the addition of a trailing shuck gives the fish something to key on during the Sulphur occurrence.

One of my favorite flies to fish during the Sulphur mayfly hatch is the Comparadun, Craig Mathews' fly takes it one step further by adding a trailing shuck for the tail.  That addition makes the Sulphur Sparkle Dun a perfect emerger during the hatch, plus with the splayed deer hair, a pattern that I will fish even as the spinners fall due to it representing spent wings from the underside.

This unique pattern is one that has become popular in the western United States, but hopefully makes its way to the East.  The Clown Shoe Caddis is a fly whose body sits in the surface film, representing an emerging caddis.  The fly has lots of visibility, thus easy to see when fishing even at a distance.  Jay Zimmerman created this great pattern, and I recommend that everyone unfamiliar with it give the pattern a try during the next caddis occurrence.

How can you go wrong with one of Patagonia's Yvon Chouinard's favorite flies?  This soft hackle, developed by Nick Nicklas from Blue Ribbon Flies, has some great materials that, when combined, prove to be very effective on trout.  In this tutorial, the pattern is tied to mimic the Slate Drake, though the Shakey Beeley can be modified to match the natural fly of your choice.