I just go a pair of woodies a few weeks ago, and now it has dropped down to -4 and I was just wondering if they woul be okay. I have them in a 4'x4' shed with a 60 watt bulb. I give them warm water and scratch an grain mixed with 16% layer for food.
All of my ducks do okay in NY winters. A few days ago the wind chill was -25 degrees. Even birds like cape teal and chiloe wigeon do fine here, so your wood ducks will be okay.