Links
pennaceous feather development: http://www.youtube.com/watch?v=95ypGX5n9fo
downy feather development: http://www.youtube.com/watch?v=6FiBwyxJa2E
Histology of Birds |
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pennaceous feather development: http://www.youtube.com/watch?v=95ypGX5n9fo
downy feather development: http://www.youtube.com/watch?v=6FiBwyxJa2E