Paleoindians were hunter-gathers that roamed in bands and frequently hunted megafauna. They roamed the park area together and occasionally visited female herds. Bones of the mammoths that roamed the area around 20,000 BC have been recovered. So-called kulaks roamed with their private herds up into the 1950s. Mastodons roamed the area during the Paleo Indian era. On land, dinosaurs roamed among cycads and conifers. Bears historically roamed the area but were largely exterminated by habitat destruction. Later Neanderthals roamed the northern Iberian peninsula. At the beginning of the century, tens of millions of bison roamed North America. Brown bears once roamed this area but have long ago become locally extinct. The elk that also once roamed the area are now gone. The now extirpated eastern cougar formerly roamed the Adirondacks.. The gray wolf once roamed the Eastern U.S., but is now extinct from this region. The city is named for the numerous deer that once roamed the area. These groups roamed the streets, often attacking casual passers-by.