Pollen analysis
Woolly rhinoceroses mostly fed on grasses and sedges that grew in the mammoth steppe. Its long, slanted head with a downward-facing posture, and tooth structure all helped it graze on vegetation. It had a wide upper lip like that of the white rhinoceros, which allowed it to easily pluck vegetation directly from the ground. Pollen analysis shows it also ate woody plants (including conifers, willows and alders), along with flowers, forbs and mosses. Isotope studies on horns show that the woolly rhinoceros had a seasonal diet; different areas of horn growth suggest that it mainly grazed in summer, while it browsed for shrubs and branches in the winter.