I would see it as a sensible thing to do in this case. Looks like a duck, labeled as a duck, probably a duck, and until I find a bird expert to decipher if it’s a duck or not I’m calling it a duck. By that point an officer will have either A. Wasted a pile of time/effort/resource on a stop, B let someone go when he wasn’t sure whether a felony was committed or not even though he had some evidence to say it was, or C hauled the guy in and let him and the bird expert explain the subtle differences between the aforementioned duck and the goose.