The article provides data on the diet of brown bear, collected in Karelia and the Terski district of Murmansk Region in the 2002-2016 years. Quantitative characteristics of the diet of the brown bear are given on the basis of analysis of the composition of feces (n = 631) and registration of patterns predator foraging activity. The seasonal dynamics of consumed food items, regional and local features are described in the article. Particular attention was paid to the role of ants in the bear feeding, to estimate this more than 800 ant colonies were examined on the routes.