Personally, based on ARNOLDS original sketch, I doubt he saw birds! Why? Well, because he drew a half circle with two straight ends. The round part is rather wide and in no way resembles the body of a Pelican. I suspect that the later pics of the Arnold sighting are most probably an artists rendition...they took artistic license, and yes, you could then argue that the pic we have seen of the Kenneth Arnold SAUCER resembles a bird...vaguely.