*EDIT* My photo host site officially shut the doors & unplugged from the internet.
I am trying to figure out where I saved them (on various thumb drives), and will fix the links as I am able. Sorry guys!
Thanks, he was sure fun to have around. Yes, we had him while living in Utah, near SLC.
I didn't plan on him either, my daughter at the time was 16 & really wanted a duck as a pet. I said no way...then her boyfriend surprised her with a baby duckling for her birthday. I was ready to strangle him! But soon the little guy was growing on me. Here he is the first week at home. This was March '05.
You can't tell the *** of the duck until his big boy feathers start coming in around 4-5 months old. At the time, I had no idea that they grew so fast. His first habitat was a big Tupperware storage container, in my daughter's bedroom. About 2.5 months later, he was big enough to jump out of that, and I knew I was in trouble. At the time, we had two large dogs in the back yard & there was no way I could let them at him.
Sooo I built him a pen out of repurposed wood that I cobbled together. I only roofed about a third, so he could stand in the rain if he wanted. It's hard to see, but I wrapped the open vertical parts with chicken wire, to keep the dogs out. The ramp doubled as a gate.
Please ignore the mess in the rest of the photo.

The next spring most of the junk was gone & I laid down sod. Also, the little (dirty) pool (ducks love to poop!) was replaced the next summer with one that took up the entire floor & was 3 times as deep.
In the left of the photo, you can hopefully make out a makeshift chain link fence. I felt guilty leaving him in his pen all the time, so I put up the short fence so he could get out & the dogs wouldn't get him. That lasted for about 3 months, until our yellow lab figured out how to hop the fence. But he was good & didn't eat Walter. I was most afraid that our pitbull would eat him, luckily Meathead (the pit) couldn't jump the fence.
By the next spring, Walter had made friends with the dogs, and pretty much considered himself a dog & would follow them around all over the yard. Ducks are very social birds & the dogs became his "flock" I guess. I still put him in his pen each night, so he would feel safe. Not that I thought the dogs would kill him, I just wanted peace of mind.
The next spring we got another duckling, and when his feathers started coming in, we saw he was male too & named him Stanley. As Stanley got older, he & Walter would fight over who was king of the pool. I hoped they would figure out that they could share, but one November day, Stanley had enough & flew away. I didn't know he knew how to fly until then.
I think Walter was happy he was gone.
Getting to the question of winter considerations, in the fall, I would remove the pool. In the back of the pen, there was a semi-enclosed room, that initially I thought he would love to hunker down in during the winter, to get out of the snow & wind. I even put straw in there. WRONG...instead, he laid in the corner closest to the camera, sucked his feet into his feathers & got snowed on.

A few times, I locked him into the little room, hoping he would like that better, but as soon as I left it open, he was right back in that corner.
Okay fine, I bought a plastic electric heat pad & secured in to the floor in that corner, so at least his belly & feet would be warm. He loved it!

In addition to being very social creatures, ducks can be very hard headed. Haha!
I'm not sure if I would get another duck...maybe in another couple years, I dunno. For the most part, they are pretty low maintenance, however in my situation, the pool was the bane of my existence. I had to clean it weekly, if I failed to do so, the built up poop & other bacteria stuff was really hard to scrub clean. In the 2nd photo, the white brush was the official pool scrubber.
Walter sure loved it when I came to clean the pool though, he would stay nearby & watch closely to make sure I was doing it right. When I was refilling it, as soon as there was enough water to splash in, he was in there splashing & making a big 'ol wet mess!
He passed away 2/10/16, a month shy of 11 years old.