The Semipalmated Sandpiper (Calidris pusilla) is a species of bird (Aves) in the family Scolopacidae (Sandpipers and Allies) and order Charadriiformes (Auks).
Calidris bairdii
Calidris falcinellus
Calidris subruficollis
Calidris ferruginea
Calidris alpina
Calidris tenuirostris
Calidris minutilla
Calidris minuta
Calidris subminuta
Calidris melanotos
Calidris maritima
Calidris canutus
Calidris ruficollis
Calidris ptilocnemis
Calidris pugnax
Calidris alba
Calidris pusilla
Calidris acuminata
Calidris pygmaea
Calidris himantopus
Calidris virgata
Calidris temminckii
Calidris mauri
Calidris fuscicollis