Hungry ducks

When I returned to the area where my car was parked, I saw a bunch of ducks on the trail looking for food. They didn't fly away when I walked among them, so I guess they've gotten used to people giving them food. One day, quite a few weeks ago, I saw a man walking along the path with a bag of bagels. He was breaking off pieces and throwing them on the trail for the animals to eat. On another occasion, I saw a lady feeding bread to the ducks. She would throw the bread on the ground next to the river. There must have been 30 or 40 ducks there eating the bread.