The Wild Turkey (Meleagris gallopavo) is native to North America and is the heaviest member of the diverse Galliformes. It is the same species as the domestic turkey, which was originally derived from a southern Mexican subspecies of Wild Turkey (not the related Ocellated Turkey). Although native to North America, the Wild Turkey got its name due to the trade routes in place. During the 16th Century, the major trade route from the Americas and Asia required the goods to go to Constantinople in Turkey before being sent to Britain. The British at the time therefore, associated the Wild Turkey with the country Turkey and the name stuck.
wikipedia: Wild Turkey