I love this video so much. I love how the pigeon reacts to the announcement. I love the unperturbed old people next to him. I love the cameraman for not making noises and spoiling it.
I dunno about pigeons but I've seen lots of stray dogs that use street crossings and only when people do, they never risk it even when there's no traffic. It's common to find a dog at a street crossing late at night just waiting for a pedestrian to go that way so it can cross at the same time.
Supposedly in Moscow packs of stray dogs use the subway/public transportation system to get around. They know which train to take, where it stops, when, etc. They've learned to use it to expand their territory throughout the city. I could have sworn we had a video on here about it.