Agriculture Minister Julie Collins said the CSIRO had confirmed a mass mortality event has occurred with the greater crested terns species in South Australia. Agriculture Minister Julie Collins said the CSIRO had confirmed a mass mortality event has occurred with the greater crested terns species in South Australia. Credit: NewsWireAustralia has recorded its first mass mortality event from H5 bird flu, with the federal government warning the outbreak could worsen. Agriculture Minister Julie Collins said the CSIRO had confirmed a mass mortality event has occurred with the greater crested terns species in South Australia. A total of 74 cases of the H5 bird flu, including 54 cases in South Australia, have now been recorded.