Dyed marabou. A very useful fly tying material.
I'm new to fly tying, and I'd like to know what kind of feathers these are. When I peel them away, sometimes I will find a tiny, long, thin feather like the one singled out. Thanks for any info.
The small feather on the right is called an “aftershaft” feather. Many birds have them behind the main shaft on each feather. Grouse, quail and pheasants have them. They are on Maribou too. You can palmer them to tie small midges / soft hackles but they are fragile and have to be reinforced. For trout flies.