These guys seem to hang around all winter long. I often wonder what makes one bird decide not to fly south with the rest of them. Is it that they are smarter, and know that they'll find food all year long? Is it that they're injured, so will have to expend too much energy or effort? Or are they lazy, and would rather take the chance on finding food in the northern climes? It's definitely got to have something to do with the climate effects of the cities - heat islands, more food, etc.
fantastic.