Who said Pigeons are stupid?

Out walking down Av. Parc the other day and, passing by the cinema, saw these pigeons huddled on the grid over the metro. There was serious warmth coming up from the station and you can see the pigeons were very cosy, all fluffed up. There were strong winds that day, blowing snow over the street but the birds felt their exposed spot was more than compensated by the open-air radiator they had found. Two drawbacks came to mind: 1- the amount of pigeon poo in Parc Metro must be really something and 2- when the pigeons move off the grid, for food, they won't feel the benefit of their feather coats as they go into the cold. Oh well, nothing's perfect...