Elizabeth II and Prince Philip in Perth, Australia

The transcript describes a royal visit to Australia, highlighting the Queen and Duke of Edinburgh's visit to Perth University despite a polio scare. It captures the last images of the royal couple on Australian soil and notes the Duke's interest in local marsupials, particularly quackers found on Rottnest and Bald Islands.

What was the general mood of the royal couple during their visit despite the polio scare?

What are quackers, and where are they found?