Can ducks or geese get frozen in a pond?

Yes, unfortunately this is exactly what happened to my rouen duck. I had a baby pool that was in their pen from summer, and had remained frozen all winter long. Yesterday, it must of thawed enough to allow him to wade, and I found him this a.m. frozen in a 1/2 inch of ice. So sad! I never saw this as a danger for them. Now, I have a solo duck. We had them for a year, and I really enjoyed watching the pair waddle and swim around together. So, my advise to anyone would be to keep all water/snow holding containers out of their pen until nicer weather.