They do have a small knob on the front of the head. They do not have much webbing between toes and spend as much time perching on roosts as swimming in water.
There are a wild goose from Australia. They are smaller and alot lighter than a domestic goose.
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There are a few private breeders that have them. They can be difficult to get to breed. Unless pinioned, they would need to be in a covered pen, as they would fly away. They do not need a pond, but access to a small pool with fresh water at least. Also need protection from cold temps...