Hi, The U.S. Fish and WIldlife Service Forensics Laboratory has a webpage for the study of feathers. They keep adding more each year and there are now 318 species of birds that have their feathers represented. Snowy Owl is there too, with 16 other Owls. It really is worth a look. http://www.fws.gov/lab/featheratlas/index.php Mike Warner Wilton, Ct.