BI-50-207Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-208Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-210Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-218Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-219Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-231Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-243Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-245Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-276Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-283Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-294Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-324Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-336Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-352Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-357Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-370Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-375Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-381Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-384Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, BI-50-432Tundra Swans (Cygnus columbianus), Lake Mattamuskeet NWR, Labels