South Australia bears brunt of Australia’s H5N1 outbreak as experts warn of wider spread

South Australia has become the epicentre of Australia’s H5N1 outbreak, registering more than 75% of confirmed cases, excluding an estimated 80-bird mortality event near Cape Jaffa. The chief veterinary officer described the situation as an unlucky first foothold for the virus in resident birds. Across the country, authorities are tightening controls, with the Royal Adelaide Show dropping bird competitions and Victoria imposing poultry lockdowns.

Scientists warn that ducks and other waterfowl could spread the virus inland, where it may threaten native species such as sea eagles, quolls and endangered parrots. While human infection remains rare, experts note the potential for spillover to mammals, especially where birds and cattle interact. Conservationists stress minimizing disturbance to wild birds to reduce stress-induced virus shedding.