The aim of the item is to collect and analyse the literature material of many researchers on trophic activity of phytophagous mammals. The characteristic of phytophagous animals’ feeding base has been given. The main emphasis in the collected material was put on ungulates, in particular on the elk as the largest dendrophage (wood-eating animal) of forest biocenoses in Russia. As a result of analysing the collected material the animals’ influence on plants has been shown, the alienation reaction of tree and bush species which are the main feeding base of phytophages has been indicated.