You may enjoy watching or even feeding the ducks at DeCoursey Pond or Clark's Creek Park. What you may not know is that feeding the ducks contributes to water pollution. When ducks get food from people as a regular food source, they tend to stick around and grow in numbers. This means more duck poo on the ground and in the water. Fecal coliform from duck poo is one of the major pollutants in DeCoursey Pond and Clark's Creek. In addition to the bacteria itself, fecal coliform contributes to higher in-water temperatures and other pollution cycles which can harm the local fish population.