Question

What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.

Answer 1

Herbivores that feed on plants are called primary consumers. Example: Insects.
Small carnivores that feed on other animals, especially herbivores, are called secondary consumers. Example: Frogs.
Large carnivores that feed on other animals, especially secondary consumers, are called tertiary consumers. Example: Birds.

Insects $\to$ Frogs $\to$ Birds
(Primary consumers) (Secondary consumers) (Tertiary consumers)