Anyone old enough to recognize this fly fishing gizmo?

I came across these theropod tracks while fly fishing in Leander, Texas : r/mildlyinteresting

Ice Fishing Tips for Beginners - On The Water

Master the Art of Trout Fishing and Catch More Fish

Simple Tricks for Trophy Smallmouth - American AnglerAmerican Angler

Big Bass From Trout Water

YELLOWSTONE CONSERVATION AND FLY FISHING WITH Craig Mathews

The Caddis Fly: Oregon Fly Fishing Blog, McKenzie River fly fishing, Oregon fly fishing reports and fly tying videos.

How to stay in the fly fishing game for a lifetime - Troutbitten

Beginner's Guide on How to Fly Fish - All You Need To Know