There are some hypotheses which are easier to test than others.
Here are comparabled head shots of the video from 11/4 and 11/6.
I'm pretty confident that they are the same bird.

http://home.pacifier.com/~mpatters/bird/uggu/uggu20001104comp6.jpg

This, of course, doesn't change anything about the abiguity of
the gull, but it does get at the two bird theory.

--
Mike Patterson Alas, to wear the mantle of Galileo,
Astoria, OR it is not enough to be persecuted
celata at pacifier.com by an unkind establishment,
you must also be right.
---Robert Park
http://www.pacifier.com/~mpatters/bird/bird.html