feral
formerly domestic organisms which survive in the wild
Australian feral camel
Feral camels in Australia, descended from animals imported in 19th century
feral horse
free-roaming horses of domesticated horse ancestry
feral goat
domestic goat established in the wild, in volume becoming invasive to the ecosystem.
feral parrot
parrot that has adapted to life in an ecosystem to which it is not native, typically an urban area
razorback
any type of feral domesticated pig, wild boar, or hybrid found world wide
feral cat
domestic cat that has returned to the wild
feral chicken
bird
feral pigeon
pigeons derived from domestic pigeons that have returned to the wild