[FabHK]

Yep, Australia has a dingo fence, a rabbit fence, and, as I learned when searching for those, now a cat fence (though much shorter).

https://en.wikipedia.org/wiki/Dingo_Fence

https://en.wikipedia.org/wiki/Rabbit-proof_fence

https://phys.org/news/2018-05-australia-world-longest-cat-pr...

[daemin]

True, but I was referring to the fruit and quarantine zones set up in parts of south and eastern Australia, where they are trying to prevent the spread of fruit fly.