Thousand Islands – Frontenac Arch Thousand Islands – Frontenac Arch The Thousand Islands – Frontenac Arch region or the Frontenac Axis is an exposed strip of Precambrian rock in Canada and the United States that links the Canadian Shield from Algonquin Park with the Adirondack Mountain region in New York, an extension of the Laurentian mountains of Québec. The Algonquin to Adirondacks region, which includes the Frontenac Axis or Arch, is a critical linkage for biodiversity and resilience, and one with important conservation potential. The axis separates the St. Lawrence Lowlands and the Great Lakes Lowlands. It has many distinctive plant and animal species. It
North American river otter larger fish on land to eat, whereas smaller fish are consumed in the water. North American river otters may prefer to feed on crustaceans, especially crayfish ("Cambarus", "Pacifasticus", and others) more than fish where they are locally and seasonally plentiful. In Georgia, crayfish accounted for two-thirds of the prey in the summer diet, and their remnants were present in 98% of the summer spraint. In the winter, crayfish made up one-third of the North American river otter's diet. A study conducted on North American river otters in a southwestern Arkansas swamp identified a correlation between crayfish consumption, fish consumption, and