Here's what happened.

Emily called me this morning from the Wednesday market in Milwaukee. She said there was a flock of pigeons poking around some old popcorn and that one of the pigeons was, in fact, a yellow and green parakeet. A few hours later she called me again to tell me we had a new bird; some lady had managed to toss a sweater over the bird, which then squirmed out and flew up to Emily's arm.

It looks pretty young to me, and/or a little beat up. I can't tell if it's male or female, but it seems pretty OK around people and the other birds. We have named it Pigeon.