I know it is a bird of prey, I know its a bad photo. I've seen these circling around Kununurra a lot
Sorry about the rubbish pic. This bird was at a pond between fields amongst a group of White ibises, White-faced herons and Pacific black ducks. Nearest I can guess is Cape Barren Goose but happy to have ID corrected by someone more knowledgeable. Thanks
Seen in the same area on two successive visits in May 2018.