animal bird Blijdorp duck mandarin Marieke Kuijpers nature wild wildlife zoo autumn fall lake leaves pond sepia swim water eye feather float fly wing Ouwehands Dierenpark beak female floating mallard reflection ripples swimming two appearance aquatic bird Australian birds circles circular common ducks fauna fowl light movements moving native-fauna omnivore omnivorous peaceful placid reflections rippling swamp-hen textures waterbirds waterfowl wild-life cutout digging isolated male sad search searching tongue walking close-up whistling White-faced