http://en.wikipedia.org/wiki/Teratornithidae
"Teratornis woodburnensis. [ 2 ] The first species to be found north of the La Brea Tar Pits, this partial specimen was discovered at Legion Park, Woodburn, Oregon. It is known from a humerus, parts of the cranium, beak, sternum, and vertebrae which indicate an estimated wingspan of over 4 meters (14 ft). The find dates to the late Pleistocene, between 11,000 and 12,000 years ago, in a strata which is filled with the bones of Mastodon, Sloth and Condors, and bears evidence of human habitation."