Australia Australian beak bill bird colored colorful colors coloured colourful colours curved-beak curved-bill downcurved-bill dusky farmer's-friend fauna featheed feathers feeding Grasslands ibis ibises insect-eating insectivore insectivorous iridescence iridescent iridescent-bronze large-waterbird long-down-curved-bill metallic-sheen naked-black-head plumage reedy grass shadows shiny straw-necked-ibis sunlight sunshine threskiornis-spinicollis waders wading-bird water-bird widespread wildlife