Of the more than 750 alligator complaints investigated by the DNR each season, more than half involve small alligators less than 5 feet in length, according to Walt Rhodes, Alligator Project biologist with the DNR based at the Santee Coastal Reserve in McClellanville. Alligators of this size feed on crawfish, aquatic insects, small snakes, frogs and turtles. The average body weight of alligators 3 feet in length is not quite 4 pounds. Four-foot alligators average about 11 pounds, while gators measuring 5 feet average only about 22 pounds.