A dead dolphin that washed up at Encounter Bay this week has tested positive for H5 bird flu. It's the second dolphin in South Australia known to have carried the virus, and it comes as the state gets ready to vaccinate the little penguins on Granite Island, just across the water.

A little penguin chick on Kangaroo Island, a 2005 file photo. Photo: Glen Fergus / Wikimedia Commons, CC BY-SA 2.5, modified