I photographed TN's first White-winged Dove at Shelby Farms some years ago and since seen and photographed several singles on President's Island until today, 8-10-2011.
The Eurasian Collared-Doves were much larger and the White-winged were pushed around and had to change perches frequiently. The young bird eventually joined the 2nd, calling adult bird on the ground where it appeard to be gritting.