These small rooster necks offer a great value to the fly tyer. For dry flies, they usually have enough small feathers to tie down to #14's, but be ready to use two hackles to fill out the collar and the stems are a bit stiff.
Some of the colors are better than the expensive capes and make for great legs on nymphs. Feather used in patterns of days gone by can be found in these Indian Cock Necks.
For streamer patterns, they are a favorite for many tiers. The feathers are webby and sturdy, holding their shape in the water. They're also great for crawdad claws.