They're from here

...
Outback Steakhouse.

I just saw one of Outback's TV commercials. One line struck me: "Happier than a Koala up a gum tree."

I wondered whether the copywriter knew anything about Koalas or Gum Trees. That got me thinking. I wondered if Outback was even an Australian company.

As it turns out they were started in Florida. Weird.

This from the wiki:

Outback Steakhouse is an American casual dining restaurant chain based in Tampa, Florida, with over 900 locations in 21 countries throughout North and South America, Europe, Asia, and Australia. It specializes in USDA Choice and Prime steaks and other offerings in an Australian-inspired environment.

Founded in February 1988 in Tampa, Florida...it is owned and operated in the United States by OSI Restaurant Partners, and by franchise and venture agreements internationally.

They're about as Australian as I am.

Oh by the way, a gum tree is a Eucalyptus.