Which groups of animals feed only on plants, and which diet is dominated by plant seeds?

Herbivores eat only plants, they are also called herbivores. This means that such animals eat almost only plants, grass, leaves, shoots, flowers, seeds. The size of herbivorous animals varies from small mice to huge elephants. These include various ungulates such as elephant, deer, goat, giraffe, koala, rabbits, roe deer and others. Some representatives of the animal world include mostly different seeds in their diet. These animals include mice, squirrels, chipmunks, various birds – crossbills, jays, sparrows.