I found out why these birds are called, "Turkeys." Before colonizing America the English were fond of eating large game birds which arrived via trade routes through Turkey. Consequently, these birds were nicknamed, "Turkeys." When the colonists arrived in the New World they saw the similarly-sized native birds and gave them the same name.
If you'd like to see some the 1/72 scale turkeys and pilgrims I painted in February click here.