If you're still updating this, here's a site that has a very large collection of feathers from all sorts of different species - it's a great reference for anyone who needs references for specific feathers for their characters.
https://www.featherbase.info/en/home
(Also I figured you should know that some of the text in this list is really hard to read with certain themes because of the pastel highlights mixing with white text)
Fun & Useful Websites's Comments