trumpeter swan calls out on frozen over swamp land

agricultural anatidae anseriformes atlantic bill bird birding black buccinator cayuga cob cold copyspace covering culmen cygne cygnets cygnus fields fingerlakes flyway frozen herbivore legs lips marshes mate migration montezuma national native neck nwr nys ornithology pair pen protection protects refuge region rests rivers scarce seneca snow snowstorm solitary swamp swan swans take territorial textarea trompette trumpeter waterfowl white wildlife winter