What is another name for an animal that is only a primary consumer?

Herbivore

Explanation:

Herbivore food chain

Herbivores are known as primary consumers. They are the first food-eaters in the food chain. Other consumers, such as wolves, eat other animals. These meat-eating consumers are called carnivores. Carnivores are secondary consumers in the food chain.

Herbivore meaning

A herbivore is an animal anatomically and physiologically adapted to eating plant material, for example, foliage or marine algae, for the main component of its diet. As a result of their plant diet, herbivorous animals typically have mouthparts adapted to rasping or grinding.