The Killdeer (Charadrius vociferus) is a medium-sized Plover. The genus name Charadrius is a Late Latin word for a yellowish bird mentioned in the fourth-century Vulgate. It derives from Ancient Greek kharadrios a bird found in ravines and river valleys (kharadra, "ravine"). The specific vociferus is Latin and comes from vox, "cry" and ferre, "to bear".