The Splits
uWren (Troglodytes troglodytes) to
Winter Wren
(Troglodytes hiemalis)
Eurasian Wren
(Troglodytes troglodytes)
Pacific Wren
(Troglodytes pacificus)
uWhip-poor-will (Caprimulgus vociferus) to
Eastern Whip-poor-will (Caprimulgus vociferus)
Mexican Whip-poor-will (Caprimulgus arizonae)
uBlack Scoter (Melanitta nigra) to
Black Scoter (Melanitta americana)
Common Scoter (Melanitta nigra)