i've done that in every zoo of mine. no one seems to care that they are out.... they'll walk right past them and some will stop to look...... and i've had about 12 lay eggs. even if they are in a "cage" they will still fly out of it and find somewhere else to go (that's why i stopped putting them in a "cage") and be careful....... inside or out...... they WILL fly away from the zoo. you may not even see a message..... when you go to count how many you have...... you'll find 2 or 3 have gone.
outside of the game...... the Norfolk Zoo has peafowl running around all the time. it's fun watching the kids running around trying to touch them LOL. when i lived in MD...... we had them at the church i went to. they would walk around the grounds and wait for church to be let out and beg us for food.
"A hundred years from now, it will not matter the sort of house I live in, what my bank account was, or the car I drove.... but the world maybe different because I was important in the life of animals and the creatures on this earth" ~ unknown