In my town's park there is a lake where some of the surface didn't freeze. It's probably because there are waterworks nearby and maybe they increase the temperature causing the water to be still flowing.
People are coming here with kids to feed the birds. But, there are so plenty of them that I'm not sure they're getting enough food. There are mostly mallards (anas platyrhynchos), typical town birds such as pigeons, jackdaws or rooks, but you can also see some common gulls (larus canus). This is quite interesting because in the past gulls always stayed north of Poland, close to the Baltic sea; nowadays, especially in winter, they're becoming more and more frequent visitors to the central Poland where I live.