In breeding season Spotted Sandpipers have bold dark spots on their bright white breast and an orange bill. The back is dark brown. In winter, as shown above, a Spotted Sandpiper's breast is not spotted; it's plain white, while the back is grayish brown and the bill is pale yellow. It is the most widespread breeding Sandpiper in North America. And it has some unusual habits. During breeding season, the males take the lead in incubating the eggs, while the females establish and defend the territory. Also, in some populations, the female practices "polyandry," which means she mates with up to four males in a season, who then each take care of a clutch of eggs. Source: Cornell Laboratory of Orinthology's All About Birds.

The Black-necked Stilt has the second longest legs in proportion to its body of any bird, exceeded only by the Flamingo. Black-necked Stilts prefer shallow wetlands, especially human-managed ones like sewage ponds, as they have some vegetation, but are not overgrown. They wade in the shallow water and eat small crustaceans and fish. Source: Cornell Lab of Orinthology's All About Birds.

In this photo of two Black-necked Stilts out for a stroll, the female is leading, and her back feathers are more brownish black as compared to the male's feathers.