RE: How many sub-species of turkey?
1. Easterns in about 2/3 of the eastern states.
2. Rio Grandes in the southwest mostly along the river drainages.
3. Mirriams in the mountainous regions of the western states for the most part and on the plains
4. Gould's in the border country of Arizona and New Mexico and down into Mexico
5. And if you REALLY want to get all of them, there is the Oscellated turkey in southern Mexico and Central America.
That's all I know of