Herbivores are first order consumers. They feed directly upon the producers, and fill the second trophic level of the food chain.

Omnivores feed directly on producers, but will also feed on other consumers. People are a good example of omnivores. Dogs are also omnivores. Omnivores are not restricted to the bottom trophic level of the food web, but are found all throughout.

Carnivores feed only upon consumers. Their diet consists of other animals and their stomach contents. Carnivores are never in the second trophic level, because they cannot eat plant matter. Carnivores are found in the third trophic level, and higher if there are four levels or more, where a secondary carnivore might eat a primary carnivore and so on, ie. hawk <- chameleon <- beetles <- aphids <- roses.

Parasites prey on living hosts, slowly killing them over months or years. There are some parasitic producers, such as strangler-vines, however most parasites are consumers, living off of other consumers. Common parasites in people are hook, tape, whip, and round worm.

Scavengers are also known as Detritivores, and are the cleaners/recycling champions of the natural environment. They consume dead organic matter, be it leaves, wood, or dead insects and animals, Detritivores will eat it! Bacteria, fungi, and some insects are all Detritivores. Some animals are called scavengers, because they eat dead or dying animals. A classic Australian scavenger is the crow, while the dung beetle is almost famous.