The food habits of grizzly bears in Greater Yellowstone Ecosystem (GYE) have been described in detail by Knight et al. (1984) and Mattson et al. (1991). Overall, army cutworm moths, whitebark pine nuts, ungulates, and cutthroat trout are the highest quality food items available to grizzly bears in the GYE. These foods impart the greatest nutritive value in exchange for the least foraging effort (Craighead et al. 1995). Grizzly bear food habits are influenced by annual and seasonal variation in available foods.
[{"bear_species": "grizzly bears", "eat": "army cutworm moths, whitebark pine nuts, ungulates, and cutthroat trout "}]
[{"bear_species": "grizzly bears", "eat": "army cutworm moths, whitebark pine nuts, ungulates, and cutthroat trout "}]