The Bird

I am not sure if this is a goose or a duck but my co-worker said they are geese. He is referring to a bunch of these birds right outside our office every morning. Sometimes they come with their kids waiting for bread from people. This lonesome one is at my bank's parking lot. I've been coming and going for the past two weeks, and she is always there, rain or shine, not bothered by the cars and eyes of people staring/taking pictures like me. The first photo was taken about a week ago and the bottom was last Sunday.