A predator hunts for prey which is the organism it attacks. This is usually in reference to one animal consuming another animal, for example, an eagle consuming a fish. In predation, the predator is a secondary consumer eating the primary consumer. Or, it can be a third-level consumer, eating the secondary consumer. Herbivores are organisms that eat autotrophs, or plant-based foods. Herbivory is a type of consumption just as a predator consumes a prey, however, in herbivory, those consumers are deemed primary consumers. They are not killing another animal, rather, they are consuming a plant which is at the bottom of the food chain.