Herbivores:

* Large Grazers:

* Bison: A keystone species, historically abundant in North American grasslands.

* Wild horses: Found in grasslands around the world.

* Antelope: Many species exist, including pronghorn in North America and springbok in Africa.

* Zebra: Found in African grasslands.

* Gazelle: Found in African and Asian grasslands.

* Cattle: Domesticated grazers, commonly found in grasslands.

* Smaller Grazers:

* Rabbits: Found in various grasslands around the world.

* Rodents: Many species, such as prairie dogs, ground squirrels, and voles, inhabit grasslands.

* Insects: Grasshoppers, locusts, and various beetles feed on grasses.

* Other Herbivores:

* Deer: Various deer species, like white-tailed deer, inhabit grasslands.

* Elk: Found in North American grasslands.

* Kangaroos: Found in Australian grasslands.

Remember:

* Primary consumers are herbivores, meaning they get their energy by eating plants.

* Grasslands vary widely in their geography and species, so the exact primary consumers present will depend on the specific location.

Let me know if you'd like more details about specific grassland types or primary consumer species!