Yes. They are very common.
on the right hand page there is a building with a balcony called 'one more saloon' wally is on the balcony, at the back
because they grown without being planted that's why they say "wild"
they evolved and have been around for a long time. pigs were ceated from breeding boars. if pigs escape after a few generations they revert back to their "wild" boar ancestors