You need to make sure they arent Hybrids . They have a fine line where they are located. It like in Florida you can even get a cross of eastern and Osceola Bird. The same for what you are talking about. YOu should find the info on NWTF website .Good luck. My dad killed the grandslam in one season but he flew everywhere. His hardest bird was the eastern bird here in Georgia. Good luck and enjoy it .