beak bird black Branta canadensis brown Canada goose England english feathers flock flotilla fowl geese goose gray Great Britain grey head natural nature neck plumage pond retreat Surrey swim swimming water white bench green leisure peaceful relax rest seat tranquil trees appearance aquatic bird Australian birds circles circular common fauna light movements moving native-fauna omnivore omnivorous placid reflections ripples rippling swamp-hen textures waterbirds waterfowl wild-life anas superciliosa black eye-stripe brown duck dark-brown duck grey duck omnivore Pacific black duck waterbird widespread wild duck anas-superciliosa aquatic-bird black-eye-stripe brown-duck grey-duck Pacific-black-duck wild-duck ducks advice alert appropriate-behavior appropriate-behaviour awareness care communicating communication concern danger denied directions inform information informing not-allowed not-permitted park permission-denied please polite prohibited prohibition prohibitions protecting protection public-park sign warning warning-sign water-birds water-fowl weathered weathering wildlife safety wariness wary worry consider hesitate hesitation pause thought uncertain uncertainty paddling reflecting sunlight sunshine surface surfaces animal asleep awake beautiful bill blue close-up cute domesticated drake feather feet game isolated lake livestock male mallard paddle ripple river sleek vertebrate web webbed wild wing yellow