Herbivores are organisms that are anatomically and physiologically adapted to eat plant-based foods. Herbivory is a form of consumption in which an organism principally eats autotrophs, such as plants, algae and photosynthesizing bacteria. More generally, organisms that feed on autotrophs in general are known as primary consumers. Comes from the Greek suffix "vora" (Greek -βόρα) meaning "which eat". By strict interpretation of this definition, many fungi, some bacteria, many animals, some protists and a small number of parasitic plants might be considered herbivores. However, herbivory generally refers to animals eating plants. Fungi, bacteria and protists that feed on living plants are usually termed plant pathogens (plant diseases). Microbes that feed on dead plants are saprotrophs. Flowering plants that obtain nutrition from other living plants are usually termed parasitic plants. It should be noted that a herbivore is not the same as a Vegetarian, which is a human who voluntarily undertakes a primarily herbivorous diet, even though such terms are often used interchangeably in modern parlance.

Some prehistoric herbivore creatures:

Sample Species Restoration
Hippopotamus gorgops
Psittacosaurus mongoliensis Psittacosaurus mongoliensis
Giraffatitan brancai Giraffatitan
Lystrosaurus robustus Lystrosaurus
Pareceratherium transouralicum Pareceratherium transouralicum
Bradysaurus baini Bradysaurus sp
Hyracotherium leporinum Hyracotherium leporinum

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