By consumer, I will assume you mean the plant eaters, though not all definitions follow suit. These include many species of insects, especially grasshoppers, beetles, and ants. read more
Primary consumers of grassland areas are herbivores, otherwise known as plant eaters. Plant-eating animals can differ slightly between the grasslands of the world such as African Savannas, Central Eurasian grasslands and the prairies of the United States. read more
Grasslands differ around the world, from the prairies of North America to the African Savanna. No matter which continent, grasslands support a wide variety of animal life. Large numbers of birds, grazing mammals, reptiles, insects and predators live throughout the grasslands of the world. read more
These include many species of insects, especially grasshoppers, beetles, and ants. This is the shortest list included in this answer, but this group is really the most diverse by far. Rodents include various species of mice, pocket gophers, prairie dogs, rabbits, chipmunks, rats, voles and more. read more