beak bird birds feather feathers frozen Heron herons ice leg legs Nyberg water winter ducks geese and swans goose neck plant swan water bird waterfowl wildlife eyes green heron nature outdoors tongue wading bird gull harbour lamp lamppost light sea seabird antarctica birds eye cold eye follow penguin penguins reflection duck ducks geese and swans fauna grass vertebrate birding blue fish fishing fly India Kingfisher perch red reflex rest sharp stick animal animals big colourful pelican pink swimming wing wings zoo Adaptation Bee Eater branch Coraciiformes green Old World oriole Perching bird songbird Australia claw tail wagtail