These windows attract a fair number of these characters. This one seems threatened, but I've seen a towyhee that seemed to be flirting. It's very funny.

https://docs.google.com/file/d/0B53RG2aM8iIMZmI1OFJuZlY3cVE/edit?usp=sharing

Nothing in the books shows the golden border to the ruby crown. Maybe it's a state of agitation that one doesn't normally see??