Thousand Islands level year-round, and support at least two living trees. The Thousand Islands archipelago is located at the outlet of Lake Ontario at the head of the Saint Lawrence River. The region is bisected by the Canada–United States border and covers portions of Jefferson and St. Lawrence counties in the U.S. state of New York, in addition to parts of the United Counties of Leeds and Grenville and Frontenac County in the Canadian province of Ontario. Geologically, most of the islands are located where a branch of the Canadian Shield runs south across the river to join with the Adirondacks. The
North American river otter openings in the ice, and may excavate passages in beaver dams for accessing open water. North American river otters are highly mobile and have the capacity of traveling up to in one day. Daily movements of yearling males and females in Idaho averaged in spring, in summer, and in autumn, respectively. Daily movements of family groups averaged in spring, summer, and winter, respectively. Both males and family groups travel drastically less during winter. North American river otters are renowned for their sense of play. Otter play mostly consists of wrestling with conspecifics. Chasing is also a common game. North American