Herman Giethoorn:
Tundra Swans, Cygnus columbianus, 31
Herman Giethoorn:
Tundra Swans, Cygnus columbianus, 32
Herman Giethoorn:
Tundra Swans, Cygnus columbianus, 33
Herman Giethoorn:
Tundra Swans, Cygnus columbianus, 34
Herman Giethoorn:
Tundra Swans, Cygnus columbianus, 35
Herman Giethoorn:
Tundra Swans, Cygnus columbianus, 36
Herman Giethoorn:
Tundra Swans, Cygnus columbianus, 37