This Caddis Larva pattern is tied with catgut biothread.
This fantastic fly tying material has an opacity aspect when is dry and when gets wet become milky translucent. You can see the difference between the dry and wet nymph at the photo!
The nymph tied with tungsten bead + lead wire. It's one of the best nymphs that can be used in the first part of the season, and not only, especially in the rivers where the caddis flies are abundant!
Hook: Barbless #12
Head: Gold Tungsten Bead
Under body: Lead wire = Thread
Body: Catgut + Rabbit dubbing
Thorax: Rabbit dubbing