Crayfish are a very important food source for many freshwater species. And this fly is made to imitate them. Bass and trout eat crayfish pretty regularly, and this fly has caught both on the end of my rod. The Crayfish Bunny Bugger is a relatively easy fly to tie, and works really well.
I have also caught a few saltwater species on this fly, as it can mimic a brown shrimp well also. Redfish and specs both love brown shrimp, and this fly can work well for them.
Hook: Daiichi 2220 Size 4
Thread: UTC Ultra Thread 140 Brown
Tail: Brown Blood Quill Marabou
Legs: Rubber Legs Barred - orange and red
Flash: Gold or Bronze Krystal Flash
Body Wrap: Yellow or Orange Chenille
Hackle: Brown Saddle Hackle
Weight: Lead Painted Dumbbell Eyes
Wing: Brown Rabbit Zonker Strip