Fig. S2.

Brown bear fecal composition data from Karluk basin, Alaska. Each survey was conducted using a different protocol, but all show the proportion of scats consisting entirely, or mostly, of a single food. The 1957 survey (52) was a visual estimate of 140 scats, 49 of which consisted entirely of one food. The 2011 scats (38) were collected from the bed sites of eight collared female bears in 2011. The contents were examined microscopically, and values were corrected for differential disappearance (60). The 2015 data are from a survey of Karluk area streams during a period with both salmon and elderberries (August 21, 2016; Methods). Although some scats had mixed food residues, each was classified by its predominant food.