New York, north into Canada, throughout most of the St Lawrence River drainage, and northward throughout the upper Mississippi valley, although the species also extends as far south as Chattanooga in the Tennessee River valley. Also, a small population is found in the Broad River in South Carolina. Several North Georgia reservoirs also have healthy stocked populations of muskie. They are also found in the Red River drainage of the Hudson Bay basin. Muskie were introduced to western Saint John River in the late 1960s and have now spread to many connecting waterways in northern Maine. The Pineview Reservoir in Utah is one of three Utah locations where the hybrid Tiger Muskellunge is found. They prefer clear waters where they lurk along weed edges, rock outcrops, or other structures to rest. A fish forms two distinct home ranges in summer: a shallow range and a deeper one. The shallow range is generally much smaller than the deeper range due to shallow water heating up. A muskie continually patrols the ranges in search of available food in the appropriate conditions of water temperature. Diet Muskies are ambush predators who will swiftly bite their prey and then swallow it head first. Muskellunge are the top predator in any body of water where they occur and they will eat larger prey than most other freshwater fish. They eat all varieties of fish present in their ecosystem (including other muskellunge), along with the occasional insect, muskrat, rat, mouse, frog, or duck. They are capable of taking prey up to two-thirds of their body length due to their large stomachs. There have even been reports of large muskellunge attacking small dogs and even humans, although most of these reports are greatly exaggerated. Length and weight As muskellunge grow longer they increase in weight, but the relationship between length and weight is not linear. The relationship between them can be expressed by a power-law equation: The exponent b is close to 3.0 for all species, and c is a constant for each species. For muskellunge, b = 3.325, higher than for many common species, and c = . According to the International Game Fish Association (IGFA) the largest muskellunge on record was caught by Cal Johnson in Lac Courte Oreilles (recognized as Lake Courte Oreilles by the association), Hayward, Wisconsin, United States, on July 24, 1949. The fish weighed and was in length, and in girth.