appearance aquatic bird Australian bird birds circles circular common fauna fowl light movements moving native-fauna omnivore omnivorous peaceful placid pond reflections ripples rippling swamp-hen swimming textures water waterbirds waterfowl wild-life accipiter gentilis avian beak Bird of prey brown feather feathers goshawk hawk hunter landscape nature predator raptor reflection resting wild wildlife wing winged wings anas superciliosa black eye-stripe brown duck dark-brown duck grey duck omnivore Pacific black duck waterbird widespread wild duck animal animals art clip art clipart graphic illustration life peacock peafowl America ecuador Galapagos island marine pelican south bald eagle eagle Anas anatidae depressed body domesticated flat bill quack short legs web-footed