We’ve just found an exotic bird dead in our garden. Had it identified by a knowledgeable friend. He says it’s a Californian quail. We don’t know of any private collections near here (sandwich) but it’s not likely flown from California or New Zealand by itself!
No - it will have escaped from someone nearby - it's not unusual for people who have an outside aviary for budgies etc to keep quail - also they are kept commercially
Cin J