I am a first time duck owner, and I have learned so much through this forum. When I first received my ducklings about 6 weeks ago, I asked for help identifying them. Three of them, we definitely know the breed, but there is still one I'm unsure of. Now that it actually has feathers, I was hoping someone might know what it is. My only guess is that it is a Blue Swedish Duck. I haven't seen another breed, that looks remotely similar to it.
Here are some pictures (sorry for the blurriness, it is about to storm and the lighting isn't super amazing outside)! The cap is grey, but seems to slowly be darkening, the rest of the feathers are still grey, and have not changed shades. Thank you for any help you can give me. :)