If the parents leave and the pond freezes over, then the young bird may not be able to survive as it can freeze, predators can walk onto the frozen pond and kill it, it could drown, die from starvation or dehydration or succumb to injury and illness from having to hunt for food in severe inclement weather.

If the parents leave and the young bird stays, we would suggest you contact Bob Knox at Knox Swan and Dogs (847-875-3947). He raises swans and is in your area. He may be able to offer some assistance and may be able to provide a good home for the swan. The Regal Swan