ahead anas-superciliosa aquatic-bird Australian bird black-eye-stripe brown-duck chicks common dark-brown direction duck ducklings fauna fowl grey-duck guidance guiding lake lead leading mother omnivore omnivorous Pacific-black-duck protection protective reflecting reflections ripples rippling sunlight sunshine surface surfaces swimming water waterbird waterfowl wetlands widespread wild-duck armor armored armorment armour armoured armourment backstraps bony ridges crocodile crocodylus-porosus danger dangerous dorsal-surface estuarine-crocodile exotic hide hornback huge Indo-Pacific-crocodile large largest-reptile leather leathery lethargic opportunistic opportunistic-predator osteoderms patterns powerful predator reptile reptilian ridges rough rugged saltwater-crocodile scales scutes skin tail tail-scutes territorial texture textured textures appearance art artistic artwork background canvas color colors colour colours female graphic illustration image light male nature paint painting pair render Rendered rendering beak beaks blood-flow captive captivity Chinese-white-dolphin clever coastal-animals coloration colored colorful coloured colourful confined conservation contrast contrasting dark-spots entertaining entertainment environment environmental Indo-Pacific-humpbacked-dolphin mammal marine-park medium-sized near-threatened oceanic perfoming performance pink pink-dolphins restricted Sousa-chinensis spots spotted teeth wild wildlife