Small mayfly nymphs make up a large portion of our local trout’s diet. We often like fancy and realistic fly patterns, but they aren’t always necessary. The Yellow Bellied Baetis Nymph is a super easy fly to tie, and it flat catches fish. Typically, we fish this fly as a dropper behind a larger tungsten nymph, or as a dropper behind a dry. No matter how you fish it, tie up a few and give them a shot!