The Nerodia sipedon, also known as the Northern Water Snake, is a non-venomous aquatic snake commonly found in North America. There are several synonyms for this species, including "coluber fasciatus," "coluber sipedon," and "coluber viperinus." Additionally, this snake is sometimes referred to as a "water moccasin," but it is important to note that this term is often incorrectly used to describe the venomous cottonmouth snake. The Northern Water Snake is known for its distinct brown or grayish coloration with dark bands or spots along its body, as well as its ability to swim quickly through water. Overall, the various synonyms for the Nerodia sipedon demonstrate the complex and dynamic nature of scientific nomenclature.