not-yet-known not-yet-known not-yet-known unknown 3.1 | Patterns of diet composition Posterior estimates for the three demographic classes indicated that there was annual variation in brown bear diet proportions, but bilberries made up the greatest proportion and was greatest in solitary males (0.54, 0.53, and 0.70 for females with dependent offspring, solitary females, and solitary males, respectively). Higher-trophic, protein rich foods (moose and ants) made up small proportions (0.03–0.07) of the diet depending on the food and demographic class. Annual estimates of bilberry and lingonberry mirrored one another (i.e., in years of high bilberry proportions, there were lower proportions of lingonberry; Figure 1 A-C). There were two years in which we had no samples from solitary males (2014 & 2015), so we could not make diet estimates for these years and thus trends in diet proportions are confounded for solitary males.