RED FOX

Foxes (Vulpes vulpes) are opportunistic predators and scavengers and have few natural predators in Australia. Red foxes pose a threat to livestock, as they prey on poultry, lambs and goat kids. In high density areas they may also be a health risk to humans and pets, through transmission of diseases.
Evidence suggests red foxes are a primary cause in the decline and extinction of many small and medium-sized rodent and marsupial species in Australia. They also prey on many bird species.
Foxes were originally introduced to mainland Australia in the 1850s for recreational hunting and spread rapidly. Today, they are abundant in all states and territories except Tasmania, where they are still at low density.