The pond was one of series in old gas tanks. I saw lots of coots with offspring but this was the only case where the parents gave me the warnings and charged me.
Haico’s friend has an apartment two blocks from Westerpark so I went there quiet a few times, and even managed a jet-lagged evening jog. The top end of the park is your classic turn of the century park. However the much larger part is in the now disused gas works that includes several jogging paths and a large quiet wild area that is fenced in for dogs to be let off their leads.
Like many city parks there was several people feeding the ducks in the classical park, But I didn't see any feeders in the wilder section.