Petroglyphs in the Colorado Plateau depict either Columbian mammoths or mastodons. They hunted by ambushing animals like deer, camels, ground sloths, bison, and young mammoths. Columbian mammoth tusks were generally less twisted than those of woolly mammoths. Slightly later, the woolly mammoths also disappeared from continental northern Siberia. Scattered along the now dried lakebed are trackways of ancient camels and Columbian mammoths. Cave paintings of woolly mammoths exist in several styles and sizes. It did not live in Arctic Canada, which was inhabited by woolly mammoths. Two spear throwers shaped as woolly mammoths have also been found in France. The Elephantidae are a family of large, herbivorous mammals collectively called elephants and mammoths. This connection explains the similarities of trees, plants, and animals including now extinct mammoths. The family Elephantidae also contains several now-extinct groups, including the mammoths and straight-tusked elephants. Bones of the mammoths that roamed the area around 20,000 BC have been recovered. It had robust twisted tusks, common of mammoths. Alaska now has low nutrient soil unable to support bison, mammoths, and horses. Next are the pictures of several mammoths and a rhinoceros.