Australian bird black-bill black-winged-stilt carnivores carnivorous dog-bird foraging himantopus-himantopus-leucocephalus long-beaked long-legged longshanks pied-stilt red-legged reflections ripples rippling sharp-beaked sharp-bill stilt stream thin wader wading water water-bird white-headed-stilt background birds color colored colors colour coloured colours cygnus-olor harmonious harmony leisure light paddling pair reflection reflective river riverside river’s-edge serene serenity swans swimming synchronised synchronized tranquil tranquilly water-birds waterways webbed-feet white white-swans bay coast cove inlet Sardinia sea stair steep step stone bridge climate crossing fairway flood floods golf course green beach creek drink feather plumage sand seagull advice alert appropriate-behavior appropriate-behaviour care communication concern danger dangers deep deep-water denied depth direction don’t-alight flowers foliage not-allowed not-permitted permission-denied plants prohibited prohibition risk risks risky safety sign signs warning wet close drop flower leaf macro margerit Nyberg rain summer UP beak eyes feathers head orange swan swim architecture buildings cheesegrater crane Gherkin London modern structure thames