Calidris pacis

† Calidris pacis is an extinct sandpiper of the genus Calidris from Pleistocene deposits in the United States. As a member of the family Scolopacidae, it was a carnivorous shorebird feeding on invertebrates along wetland and coastal margins. The species name 'pacis' suggests a possible Pacific coastal association. It contributes to the record of Pleistocene shorebird diversity in North America and the understanding of historical Calidris distribution before modern climatic shifts.