I grew up with two different parakeets - one that lived for five years, and one that lived for 13 years - so I always had a bit of an attraction to birds and it's an oddly good fit to be in a movie about birdwatchers.
Jim Parsons(Wil Wheaton) was so fun to have on the set, and he was such a good guy, just in general. He seemed to be completely okay with the fact that his entire name became a mantra of vengeful hate. That didn't seem to bother him.
Jim Parsons