The starling and herl soft hackle fly pattern is one of my favorites. For fly fishing with soft hackles, my favorites usually involve peacock herl of some sort.
The starling feathers are usually small, and work well on flies size 14 and smaller. Other feathers may be substituted like partridge, hen, and quail.
Peacock herl is fragile, this demo shows adding a wire rib to reinforce the herl, so you can catch a few fish on the same fly.