The island is younger than it looks. It rose into being about six thousand years ago, when the seas climbed at the start of the Holocene and drowned the old coastal plain, leaving this slab of calcarenite standing just proud of the water. It is barely separated from the mainland at all. A sandy spit links the two, and at extreme low tide that spit dries enough to walk across, turning the island briefly back into part of the shore. The surrounding waters are shallow, less than five metres deep, so the whole place feels less like a true island and more like a piece of coast caught mid-departure.

In 1982, the island became an ark. Conservationists released ten brush-tailed bettongs here, small, hopping, critically endangered marsupials, hoping the isolation would shield them from the predators decimating them on the mainland. For a while it worked. The colony grew and steadied at around twenty animals. Then, in 1994, the ark was breached. A fox-like predator made the same short crossing the bettongs' keepers had counted on to protect them, and the entire population was destroyed. The lesson was brutal and simple: on a coast this porous, even an island offers no guarantee of safety.

What the island does shelter is birds. Surveys have logged pelicans gliding in to land, ospreys and white-bellied sea eagles hunting the shallows, fairy terns, plovers, and oystercatchers working the tideline. Bull skinks and marbled geckos slip between the rocks. The vegetation splits roughly in two: a low shrubland tangled with umbrella bush on one side, open grassland on the other, dotted with shore westringia, flax lily, and wiry speargrass. It is a tiny, self-contained world, the kind of overlooked habitat that conservation status exists to keep intact.

Baird Bay itself is no secret. The little fishing village on its shore has become one of the most sought-after wildlife encounters in Australia, the only place in the country where you can swim with wild sea lions and wild dolphins in a single day. The sea lions haul out on Jones Island just across the water; the dolphins cruise the bay's calm, sheltered shallows. The unnamed island sits quietly at the northern end of all this, a wetland of national importance, protected since 1967 and folded into the Baird Bay Islands Conservation Park since 1972, watching the wonder unfold around it without ever asking to be noticed.

Humans have left only the faintest marks here. A small stone hut was once built into a section of the coastal cliff, probably the work of fishermen seeking shelter, and a lone limestone chimney still stands where a small house once existed on the island. There is no village, no jetty, no road, only the worn hut and the chimney standing against the wind. The island keeps its anonymity the way it keeps everything else: lightly, and almost by accident. After six thousand years of waves and weather, the most remarkable thing about this small rise of stone remains the blank space where its name should be.