I learned to fly fish catching bluegills! A gray wooly worm size 10 will catch them everytime easily. Poppers are a great time as well. I don't find many big bluegills 4-6 inches are common where I fish. I did manage to catch a "huge" bluegill one day while fishing several years back. I was using a streamer fly looking for crappie and a bluegill hit it. I thought I hooked a 15 inch bass but ended up a bluegill bigger than my hand swallowed that streamer. That was the biggest bluegill I ever caught and still remember it to this day. Panfishing with a flyrod is great fun!