Breeding occurs in the northern half of North America. The female is the first to arrive at the the breeding territory and she is its primary defender. The nest is typically built of grasses and stems and is located on the ground under vegetation near to water.
Once the female lays her eggs she will often go in search of other mates, leaving the male to perform the duties of primary parental care. The female may mate with up to four males at the same time. If she can not find a mate another mae she will usually stick around and help the male incubate the eggs and raise the chicks.
Spotted sanpiper are migratory birds. Since they eat primarily insects, both aquatic and land based, it is difficult to find food through out most of their breeding range in the north half of North America. So they head south were they look for any any habitat which has water in the southern US, Mexico, Central and South America. This sandpiper was photographed on the banks of the St Croix River in Wild River State Park