I think ideally a population of animals shouldn’t be considered “wild” until they’ve started breeding out of captivity and shown themselves capable of surviving outside for at least a year. But on a practical level it’s hard to tell if a cat wandering around a city is feral or not, or whether or not a domestic goose associating with a wild Canada Goose is close enough to be considered breeding… So I think I agree with assuming captive unless the observer or another local with experience says otherwise.
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