Fig. 4
From: Diet segregation in American bison (Bison bison) of Yellowstone National Park (Wyoming, USA)
Stable isotope values of carbon (δ13Ccollagen) and nitrogen (δ15Ncollagen) from collagen tissue of male and female bison. Open symbols represent males, and filled symbols represent females. Bold diamonds with bars represent mean ± 1 standard deviation, while lighter diamonds represent raw data