A welcome sign of spring after a harsh winter, tundra swans stop to rest in southern Ontario wetlands before continuing their journey to their Arctic breeding grounds.  Tundra Swan in FlightTundra Swan (Cygnus columbianus) in Flight Against a Blue Sky - Ontario, Canada Group of Tundra Swans in FlightGroup of Tundra Swans (Cygnus columbianus) in Flight Against a Blue Sky - Ontario, Canada Tundra Swan in FlightTundra Swan (Cygnus columbianus) in Flight Against a Blue Sky - Ontario, Canada Tundra Swan in Flight Against a Deep Blue SkyTundra Swan Flying Overhead in Spring Against a Deep Blue Sky - Ontario, Canada