Beans and rice are fine for awhile. But when you get hungry for meat, find a park, lay out a net and a handful of that yummy cooked rice. Those city pigeons will gather round. They are very fat and tasty! Yummm! Relevant posts:

http://blog.wired.com/wiredscience/2008/07/does-pigeon-mea.h...

Or, if you don't want to be caught with a net see http://www.associatedcontent.com/article/127077/a_profession...

And here are some posts on trapping, dressing and cooking them: http://www.survivalistboards.com/showthread.php?p=206758

One post says pigeons were good city fare during the Great Depression.