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consumer

noun

An organism that generally obtains food by feeding on other organisms or organic matter due to lack of the ability to manufacture own food from inorganic sources; a heterotroph.

Any of the organisms in all trophic levels in a food chain, except for producers.

In a food chain, the levels of consumers are:

• primary consumers – herbivores that feed on producers
• secondary consumers – consumers that feed on primary consumers and/or producers
• tertiary consumers – consumers that feed on secondary and primary consumers, as well as on producers