Australian bird black-winged blue-black carnivore carnivorous crest crested egretta-picata green Heron long-legged pied-egret Pied-Heron pond reeds reedy reflections sharp-beaked sharp-bill sharp-eyed thin wader wading wading-bird water yellow-bill yellow-legged Ardea-picata carnivores lakeside water-bird White-headed-Egret black-bill black-winged-stilt dog-bird foraging himantopus-himantopus-leucocephalus long-beaked longshanks pied-stilt red-legged ripples rippling stilt stream white-headed-stilt aquatic black cautious himantopus-himantopus mature shore-bird territorial white wide-spread anhinga-novaehollandiae Australasian-darter Australian-darter Darter darters divers diving forager freshwater-wetlands large long-necked long-tailed serpentine sharp-pointed-bill sinuous-neck slim snake-like-neck snakebird spear-bill submerged-swimmers Australian-raven beak bearded bill carrion-eaters corvids corvus-coronoides crow garbage-collectors grass loud mournful omnivorous predators raven ravens scavengers shiny-black strong