I can’t say that Grand Teton National Park has an abundance of birds in the winter. I have seen very few species and very few numbers of birds. Therefore, almost all of my bird photography has been done immediately north of Jackson, along Flat Creek. Flat Creek flows thru the National Elk Refuge prior to crossing Highway 89/191 and meandering thru town. The amount of open water varies greatly by day and time of day. Extreme cold weather leaves very little open water and congregates the overwintering waterfowl. Warmer temperatures allow more of the creek to open up and the waterfowl spread out on the open water.
The Mallard is our nation’s most common duck. Scores of Mallards overwinter in the Jackson Hole vicinity. They are dabblers, meaning they tip forward in the water to feed. When they take flight, they jump up out of the water; unlike other species that run along the surface of the water to gain speed before becoming airborne.
The males and females of many bird species are different in appearance. This definitely holds true for the Common Goldeneyes. The drakes and hens do not look alike. These are diving ducks.
Another common waterfowl species at Flat Creek is the Trumpeter Swan. If there is open water, you can just about count on seeing the Swans.