'Wild dog' refers to any dog living in the wild, including feral dogs (Canis lupus familiaris), dingoes (Canis lupus dingo) and hybrids of the two.
Wild dogs can have both positive and negative impacts on the environment.
Predation by wild dogs can reduce the impacts of overgrazing in arid and semi-arid ecosystems by regulating the abundances of native and exotic herbivores. Wild dogs may also suppress the abundances of cats and foxes, thereby reducing the threat these introduced predators pose to a broad range of small- to medium-sized ground-dwelling mammals and ground-nesting birds.
Conversely, under some circumstances predation by wild dogs may have significant direct impacts on threatened species, such as koalas.