We have a lot of rice fields near our house. In the winter, these fields are natural wetlands that attract migrating geese and ducks. One of my favorite places to look for geese, ducks and other water birds is next door to the high school. As we drove up, all the geese were flying off. A little while later, some of the ducks decided to follow.
Here are a couple of "cropped" shots from the larger photo above. If you look closely, you can see that these ducks are flying off in pairs. While both of these close-ups focus on the drakes, you can see the female duck in the bottom picture.
These appear to be Northern Pintail Ducks.