Distribution wrap is the terminology I learned for the technique mentioned above. This video, despite needing a good edit, is decent at doing it and explaining it. He uses a heavy thread which may have made the job more difficult than it needed to be, and did the distribution over the thread instead of bare hook, which also may have made it more difficult--depends on the tier.
Tying Soft Hackles With Large Feathers
Since this is the first thing tied on the hook, you can do your distribution wrap, then check to see if it gave you the coverage you want, and if not, try it again until it looks how you want.
As for names of birds that give the sizes tiers want for a soft hackle wrapped conventionally, as in # 18 to # 14, good luck after you get past starling, at least in the U.S. I'm sure they exist, but I'm not familiar with them at least as far as what you can get from a fly shop.
A bird hunter who fly fishes would be a resource to treasure. I am sure ye olden soft hackle tiers of the U.K. killed their birds for the table or for sale to the restaurant and made use of the feathers because they were free.
gfen, I think you mean W.C. Stewart (The Practical Angler) as the one who twisted starling around the silk thread, then wrapped back to about mid shank to tie off. He got the idea from a friend, but we know the pattern as Stewart's black spider.