Sheep Creek, in Juneau, is one of the best places to see and watch Gadwalls in winter.
In Southeast Alaska and most of the rest of Alaska they are considered rare to uncommon.
Information on Gadwalls can be found by looking at Leschack, C. R., S. K. Mckinght and G. R. Hepp. 1997. Gadwall (Anas strepera), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/283 doi:10.2173/bna.283
Some interesting information about Gadwalls can also be found by looking at https://www.allaboutbirds.org/guide/Gadwall/id
