a mute swan in the marsh at bombay hook nwr in delaware.

'mute' america animal atlantic aviary bay beak bird birders birding black bombay bordered coast conservation creek delaware derives duck ducks flyway freshwater goose habitat habitats hook impoundments incubate knob loss mallard marsh mid-atlantic migrate migration migratory mute national native natural nature nest nestling north nwr orange plumage populations protection protects ramsar range reflection refuge refuges research rook rookery roost salt sea seabird shorebird species state swan tidal vocal water waterbird waterfowl wetland white wildlife wing