Waiting for the A Train, the Sophisticated Pigeon: "A little more than a year ago, a motorman and a conductor on the A line, which terminates at the Far Rockaway station, swore to this reporter that it was true. They said it was common knowledge among longtime riders and those who worked on the line. Pigeons, they said, would board the trains at the outdoor terminal and step off casually at the next station down the line, Beach 25th Street, as if they were heading south but were too lazy, or too fat, to fly.
"

The bit in that article about a cat riding a dog is true. I’ve seen this very thing with my own eyes. I forget if it was here in DC or back in Boston.