Sanderling (Charadrius semipalmatus) Photographed in Ano Nuevo State Park, California, by Jim Rosso. Adult Sanderling is in the upper left shot and the immature plumage is in the lower pictures. Charadriiformes Natural History Notes Birds in the Classroom The Bird Groups Back to Home Glossary Themes Other members of the genus Calidris: Baird's Sandpiper Western Sandpiper Red Knot Semipalmated Sandpiper Pectoral Sandpiper Dunlin Least Sandpiper