In news that will ruffle feathers nationwide, South Australian Premier Peter Malinauskas has declared a “significant escalation” of H5 bird flu after more than 1,000 greater crested terns were found dead across three mass mortality events. Because nothing says 'escalation' like a thousand birds deciding to collectively check out.

The deaths, presumed to be caused by H5 bird flu, were detected during aerial surveillance on Wednesday on offshore islands. The terns were found on Troubridge Island off the Yorke Peninsula and the Pages Islands (North Page and South Page) off Kangaroo Island. These are the biggest mass casualty events since the deadly strain arrived on the Australian mainland in June, which is like winning a trophy no one wants.

Adding to the concern, state authorities are investigating a suspected case in a little penguin on Kangaroo Island - a development Malinauskas described as of “particular concern.” Because if there's one thing we need, it's penguins getting in on the action. Tasmania is also investigating 28 little penguin deaths on King Island, with tests underway to see if H5 bird flu is the culprit.

Greater crested terns, the common seabird that's been hit hardest, are joined by a worrying footnote: the Pages Islands are a breeding site for endangered Australian sea lions, and long-nosed fur seals visit. So far, no mass mammal mortality events have been detected, which is the avian equivalent of 'knock on wood.' Malinauskas reassured that no poultry or livestock have been affected, and the state remains vigilant with helicopters, planes, and drones - because when you're fighting bird flu, you need an air force.

New cases in terns were also spotted in Flagstaff Hill, McLaren Vale, North Haven, Lucky Bay, and Tanunda in the Barossa - proof that H5 is moving from coast inwards, as biosecurity boss Georgie Cornish noted. Even a raven at Port MacDonnell tested positive, making it South Australia's first confirmed case in a raven. Because of course the ravens are getting involved.

The state is considering targeted vaccination of captive and managed populations of threatened native birds, including little penguins, orange-bellied parrots, red-tailed black cockatoos, cape barren geese, and pelicans. Vaccinating wild birds broadly? Not practical or appropriate, says Malinauskas. But for captive ones, it's on the table. They're also looking into vaccinating Australian sea lions at Seal Bay, despite no registered vaccines for mammals - though the US has experimented on a few seals, because why not.

Meanwhile, New South Wales confirmed H5 in seven birds at Narooma and Merimbula, including six terns and a giant petrel, and is planning to vaccinate captive species like regent honeyeaters and little penguins. Tasmania, ever the cautious one, is waiting for lab results on those 28 penguins and three terns found dead at the Port of Grassy. A spokesperson said they understand the distress this causes, especially for penguin lovers. So if you're feeling down, just remember: the birds are dying, but at least we have a plan.