Why can't birds live in space?

No muscles in their throat to force food down, i.e. swallow.

I thought this was a pun at first.
The internet has ruined me

Cause birds live in trees

Go kiwi go!

So what about the birds sent to the ISS ? They didn't die. (They were sent up for the astronauts to study the lack of gravity on animals that use wings for travelling)

http://m.youtube.com/watch?v=w4sZ3qe6PiI
NASA did send birds into space