Keep pet cats indoors, say researchers who found they kill 230m native Australian animals each year

Australia's 3.7m domestic cats wreak environmental havoc and should be contained, authors of new study say

Domestic cats are killing an estimated 230m native Australian birds, reptiles and mammals every year, according to new research that quantifies the pet's national toll on native animals for the first time.

Researchers said owners of Australia's 3.7m domestic cats needed to make sure their pets were indoors or contained to reduce their impact on native species.