In July 2015, feral cats were officially recognized by the Australian government as a "pest threatening the unique local fauna." The extermination of two million individuals is an extreme measure, which they decided to turn to after other methods turned out to be ineffective.

and now

Australia is seized by a new natural disaster. Following fires, floods and droughts came the mouse plague, a gigantic invasion of rodents that forces farmers to burn their crops. Others are forced to flee their own homes.

Australia suffers from an invasion of mice about once every ten years. Older farmers recall the 1970s, when there were so many mice that the ground seemed to be moving.

The invasion of mice leads to millions of losses.

One of the reasons is new management methods. To keep the dry soil moist, Australian farmers are planting new crops directly over the stubble - the stubble left over from the harvest.

It serves as a shelter and food for mice at the same time.

Biologist Steve Henry calls mice "reproductive machines." They begin to reproduce offspring as little as six weeks old.

After three weeks of pregnancy, a litter of ten mice is born. And the parent individuals continue to reproduce without any breaks between pregnancies.

Four months later, some of the “babies” reach maturity on their own and mate, giving birth to “grandchildren”. You now have up to 90 individuals plus two original ones.

For eight months - and this is approximately one breeding season - one parental pair of mice produces offspring of about 500 rodents.

And that's just from one pair of mice! Take four - and you already have 2 thousand. The population is growing exponentially and reaches millions.