The major difference between primary, secondary and secondary consumers is, primary consumers are the plant eater or herbivores where as secondary consumers can be either carnivores or omnivores.
Food chain is composed of three components producer, consumer and decomposer.
Consumers are organisms which is dependent on producer or autotrophs to get energy by coming them or their organic matter. They can be categorized into four categories.
Primary consumers or herbivores only eat plants and their products. Examples include zooplankton, butterflies, rabbits, pandas and elephants.
Secondary consumers depend on primary consumers for their nutrient Examples are earwigs, ants, , rats, snakes, crabs, hedgehogs, blue whales, human.
Tertiary consumers or carnivores depend on both secondary and primary consumer for their nutrient. Examples includes hawks, snakes, crocodiles etc.
Quaternary consumer is a consumer which eat a tertiary consumer. Examples are shark, polar bear and alligator.
Some consumers are omnivores which eat both plants and animals.
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