Did you know the Casperkill Creek is part of the Hudson River Watershed? This means that the Casperkill drains into the Hudson River. Therefore, the water quality of the Casperkill impacts the water quality of the Hudson River. It is important for us to take care of all water sources around us. Do you know what types of critters you might find in the Casperkill? There are some special organisms called aquatic macroinvertebrates which means that they are animals that live in the water, have no backbone, but you can see them without a microscope. They are an important part of the food web as they provide a meal for many fish, birds, and other predators. Examples of macroinvertebrates include the larval stage of many terrestrial insects, such as dragonflies, mayflies, and mosquitoes, but also include crayfish and freshwater mussels.