Alligator tugs were a type of amphibious vehicle used in the forestry industry throughout Ontario, Quebec, the Maritime provinces of Canada and the northern United States from the mid-19th century to the beginning of the 20th century. These tugs were so named because of their ability to travel between lakes by pulling themselves with a winch across land. Alligators served as a "warping tug". They towed log booms across lakes and then portaged themselves using a winch to the next body of water. The rugged, steam-powered tugs were one of the pioneers in the mechanization of the forest industry in North America.