difference between primary, secondary and tertiary consumers 

Primary consumers are those that consume the primary producers (plants). For example- rabbits consume grass.

Secondary consumers are those that consume the primary consumers (herbivores). For example- Snakes that consumes rabbit.

Tertiary consumers are those that eats the secondary consumers (large predators). For example, owls that eat snakes.

 

Further, there are also quarternary consumers that consume the tertiary consumers. For example, hawks or vultures that consumes the owls. Mostly those include the scavengers,