Caper White butterflies are migrating west of the Great Dividing Range, which is the third-longest stretch of mountains in the world, in order to lay their eggs and find food.

By Rebecca Oh

In the day's other headlines, recovery and remembrance continued in Tucson and a memorial service took place in Washington for Richard Holbrooke, a veteran diplomat who died in December.

John Irvine of Independent Television News reports from Brisbane, Australia, where a major evacuation has taken place as massive floods approach.