aquatic bill bird brown duck feather feathers float floating fowl lake plumage pond river swim swimming water wildfowl across the river activity Australia bridge bushland dangers enjoyment ferry hilltop icon iconic Kings Park late afternoon manoeuvrability mobility movement Narrows Bridge outdoor outdoors outside park people Perth popular power river ferry riverside safety security skill summer Swan River tide tourists transport transportation travel trees turn war memorial wash waterways erosion glaciere melting mount mountain national rainer rocks Roots snow sundland us usa Washington barco boat canal gondola gondolas gondole gondoleiros gondoles italie Italy Venezia Venice venise