Officials urge the public to report sick animals after a confirmed and suspected case of deadly bird flu, as experts warn of the potential impact on wildlife. Fears are growing that a deadly avian flu strain discovered in Australia’s largest state is spreading, with 16 sick or dead birds reported, although the government is calling for calm. The H5N1 variant of the virus was confirmed in a sick brown skua found on a remote beach near Esperance in Western Australia, about 700km southeast of Perth.