Fig. 2
From: Diet segregation in American bison (Bison bison) of Yellowstone National Park (Wyoming, USA)
Mean and 95% confidence intervals for each combination of sex and range for δ13C of collagen (δ13Ccollagen). Points represent mean values for δ13Ccollagen and bars represent 95% confidence intervals. Sample sizes for Northern Range bison are n = 11 for females and n = 4 for males, and sample sizes for Central Range bison are n = 13 for females and n = 12 for males