Not bothered

I see these birds most days, but they usually take to the water when they see me approaching. This one wasn't bothered. Later on I came across two girls, about twelve-ish, coming home from school. One of them was threatening to chuck the other's phone in the canal. They appeared to be twins, and were having hysterics. They gave me a sarcastic "hello," and I said; "I see you are having a good day." They weren't bothered either.