@villa feather i don´t know what exact supplier. I got it from a friend when he was cleaning out the closet. But any feather will probably work.
you can check this link below. copy it to your browser and i hope you can see how i do these small fish. you have a translation button on the page.
On FlyFlasher.com you can find 29,606 flies from all over the world. Flash your own fly patterns, upload your current work or search for inspiration. The flies are tagged, so you easily can search for them.