Extinct Long-horned Bison & Ancient Bison (Bison latifrons and B. antiquus) Fact Sheet: Diet & Feeding

Clues to fossil mammals' diets come from not only teeth, but also
skull shape, amount of space indicated by bones for a stomach and guts, from fossil dung and gut
contents, from lab analysis of oxygen isotopes in bone and teeth, and by looking at diets of
similar modern animals.

• Bison are ruminants that graze and browse
  Bison latifrons: more of a browser than a grazer
• An eye-level browser, feeding on small trees and shrubs
• Bison antiquus: more of a grazer; some browsing
• Feeding on low-growing herbs and shrubs

McDonald (1981)