Leeches work well in stillwaters year round. They are always a good choice during a lull between hatches. My favorite is "Glen's Leech." I've done well with brown and black, but olive is my favorite color for this fly. It seems to imitate a damsel nymph as well as a leech. I tie them in size 12, very small, and I've had tremendous results with and without indicators. A mohair leech was the winning ticket for me this year at Coffeepot Lake. A squirrel strip leech tied zonker style with a simple thread body and rib is a fantastic pattern. Wooley buggers make good leech patterns, but i grew bored with them years ago. Since then I've enjoyed tying variations such as the Seal Bugger, another fantastic leech pattern by Denny Rickards. There is no end to the types of leeches you can tie. Don't be afraid to tie them very small for stillwaters. James W.