What are the 4 types of consumers?

The four types of consumers in ecology are herbivores, carnivores, omnivores, and decomposers. Herbivores are consumers who only eat vegetables, plants, grass, or some type of vegetation. An example of an herbivore would be a horse or a cow. A carnivore is a consumer who eats meat, or something that consumes other consumers.  An example here would be a lion or a tiger. Omnivores are animals who are a combination of the first two, in that they consume a mixed diet of vegetation and meat. Examples of omnivores would be bears, humans, and birds. The last group, decomposers, consume the remains of dead plants or animals. Examples of this would be fungi or bacteria. Each one of these consumers occupies its own unique niche in the grand circle life.