Fig. 4
a Raw data (bottom-left), density distribution (top-left and bottom-right), and stable isotopes related to dietary niche regions (top right) of δ13C and δ15N profiles of C. alexandrinus and C. dealbatus feathers generated by “nicheROVER” (Swanson et al. 2015). The niche region of C. alexandrinus (blue) contained that of C. dealbatus (yellow) and was the broader of the two regions. b Distribution of the posterior probability that an individual from one species is found within the niche region of the other species. Vertical lines for mean and 95% credible intervals are included in the histogram of each overlap metric