The highly contagious and deadly strain of avian flu was detected near the first site, with authorities now required to euthanise an estimated 87,000...

The highly contagious and deadly H7N8 strain of bird flu has been detected at a second farm in the Hawkesbury region, NSW's health minister says.

Authorities are urgently confirming whether a large-scale bird flu outbreak in one state has spread across the border.

A commercial farm in NSW is under lockdown after bird flu was found in chickens, although the strain is different to the outbreak impacting Victoria.

A commercial farm in NSW is under lockdown after bird flu was found in chickens, although the strain is different to the outbreak impacting Victoria.

A commercial farm in NSW is under lockdown after bird flu was found in chickens, although the strain is different to the outbreak impacting Victoria.

Bird flu has been detected at a commercial egg farm in Sydney.

Hundreds of thousands of birds have been killed on a poultry egg farm after authorities detected bird flu on the property.

Avian influenza has been found at a second egg farm in the Hawkesbury district.

Avian influenza has been found at a second egg farm in the Hawkesbury district.