More than 20% for many inland grizzly bears, e.g. Yellowstone: Approximately 45 ± 22% (equation image ± SD) of the assimilated nitrogen consumed by male griz

More than 20% for many inland grizzly bears, e.g. Yellowstone: Approximately 45 ± 22% (equation image ± SD) of the assimilated nitrogen consumed by male grizzly bears, 38 ± 20% by female grizzly bears, and 23 ± 7% by male and female black bears came from animal matter. https://wildlife.onlinelibrary.wiley.com/doi/abs/10.1002/jwmg.483?casa_token=JGU9JINWtTEAAAAA%3AB5Bo0tlJAgNTc-8aWnTdizFMHbsQAoc7rCyTzJFalCs2m5rdtKIBjKnkIT7cCXDd1pEljrCTHc3imQ https://wildlife.onlinelibrary.wiley.com/doi/abs/10.1002/jwm... Diet varies a lot by region. Figure 7 here: <https://www.researchgate.net/profile/Bruce-Mclellan/publication/237973810_Implications_of_a_high-energy_and_low-protein_diet_on_the_body_composition_fitness_and_competitive_abilities_of_black_Ursus_americanus_and_grizzly_Ursus_arctos_bears/links/56d0865908ae85c82348721d/Implications-of-a-high-energy-and-low-protein-diet-on-the-body-composition-fitness-and-competitive-abilities-of-black-Ursus-americanus-and-grizzly-Ursus-arctos-bears.pdf https://www.researchgate.net/profile/Bruce-Mclellan/publicat...> Shows that for female grizzlies without salmon in their diets, % meat seems to vary from around 0% to 60% based on population.