<i>Actitis macularia</i> Length: 7-8" <p> The Spotted Sandpiper is distinctive because of the large dark spots on their undersides during the breeding season. They have a shortish beak and yellow legs. Spotted Sandpipers are solitary and seldom seen in flocks. They are known for bobbing their rears up and down. </p> <p> Spotted Sandpipers are found throughout North America. </p>