After wintering in the tropics, solitary sandpipers are currently passing through New England on their way to their breeding grounds in the boreal forests of Canada and Alaska. Unlike most sandpipers, which migrate in flocks, the solitary sandpiper migrates alone (hence, its name), stopping along the banks of ponds and streams for insects to fuel its long flight. One of the more unusual behaviors of this shorebird is its tendency to lay its eggs in the tree nests of several different song birds, including the American robin, rusty blackbird, eastern kingbird, gray jay and cedar waxwing. Of the 85 sandpipers worldwide, only two are not ground nesters. Unlike most tree-nesting birds, its young are precocial, and are able to leave the nest as soon as their down dries.