mute swan (cygnus olor) side portrait

adult animal appearance aquatic asia beak behavior bill bird black blue breeding build characterized coastal compared curved cygnus distinctive duck ducks eggs environments estuaries europe feeding freshwater goose graceful grayishbrown herbivorous including inhabit juveniles knob lakes large lay long mallard mute name native nature neck nests olor orange portrait prominent refers reflection relative rivers seabird season seven side silence swan swans territorial variety vegetation water waterbird waterfowl white wildlife wing