(Yep, yarn for tying flies)

Tracy Petersen fly tier

Yarn Nymph - Tenkara Flies

Simple Yarn Tenkara Flies

Made my own dubbing with acrylic yarn and a food processor : r/flytying

Simple Yarn Tenkara Flies

Hairwing Dun PMD #16 - Dry Flies - Alaska Fly Fishing Goods

Greatfishing 5 colors egg yarn fly tying material is a soft, fluffy yarn which is commonly used on Glo Bugs, minnow streamers and other egg

5 Colors Synthetic Fibers Egg Yarn Fly Tying Material for Minnow Bait Samlon Egg Fly Dry Flies Trout Steelhead Fishing Lures

Simple Yarn Tenkara Flies

Fly Tying for Beginners - an AP Stonefly Nymph

Everything you need for Fly Tying - Yarn

Simple Yarn Tenkara Flies

Tracy Petersen fly tier

Simple patterns Fly Fishing Forum

Tying Flies with Common, Everyday Materials

Troutbitten Fly Box - The Jig Streamers - Troutbitten