https://phys.org/news/2018-05-australia-world-longest-cat-proof-wildlife.html

The Australian Wildlife Conservancy this month finished building and electrifying the 44-kilometre (27-mile) long fence to create a predator-free area of almost 9,400 hectares (23,200 acres) some 350 kilometres northwest of Alice Springs.

"Australia does not have an effective strategy for controlling cats," AWC chief Attius Fleming told AFP.