Can you tell if you're looking at a feral mallard or a wild one? I was at a park and my older sister (overly argumentive ) was looking at a pair of mallards, I mentioned something about them probably not being wild then she just jumps in and starts at it how do I know, they might be and blah blah blah! I swear she should be a lawyer. I always back down from banters with her, but birds are my thing so I was aiming to prove her wrong I told her how being at a park where there are ducks that aren't wild (crested ducks) people are most likely buying them raising and releasing. This really is more of a rant, but I would like to know if there is a way you can tell.