This Berkeley traffic light is a curious automation because it was selected by these pigeons to play a game, i guess, a very important competition because they are playing it every day at sunset. The winner sits in front of the red light while is on.
I keep wondering why the pigeons selected such a place to stand on a queue. Waiting in line at a traffic light is a human behavior, but it this case, it applies to pigeons as well.
I am guessing, the bird sitting at the red light is waiting for the green light as a sign to move. If the bird does not move out, on green, all the other birds start to honk. Automations can be useful to humans and to animal as well.
