I have had some in my pond every year but they never survive. This winter there were 3 at around the same time, and all 3 had serious injuries that killed them. I have no idea what was attacking them. The orfes maybe?
Other years there were others that had no obvious wounds, but were still found dead in the pond.
My pond is in a greenhouse for winter and it never freezes, and no predators should be able to get in. It just isn't conducive to housing newts.