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^{[page needed]} such as plants, algae and photosynthesizing bacteria. More generally, organisms that feed on autotrophs in general are known as primary consumers.

Herbivory usually refers to animals eating plants; fungi, bacteria and protists that feed on living plants are usually termed plant pathogens (plant diseases),and microbes that feed on dead plants are saprotrophs. Flowering plants that obtain nutrition from other living plants are usually termed parasitic plants.

A herbivore is not the same as a vegetarian, a human who voluntarily undertakes a primarily herbivorous diet.

Herbivore is the anglicized form of a modern Latin coinage, herbivora, cited in Charles Lyell's 1830 Principles of Geology.Richard Owen employed the anglicized term in an 1854 work on fossil teeth and skeletons.Herbivora is derived from the Latin herba meaning a small plant or herb, and vora, from vorare, to eat or devour.

Jon Stewart (born Jonathan Stuart Leibowitz; November 28, 1962) is an American political satirist, writer, television host, actor, media critic and stand-up comedian. He is widely known as host of The Daily Show, a satirical news program that airs on Comedy Central.

Stewart started as a stand-up comedian, but branched into television as host of Short Attention Span Theater for Comedy Central. He went on to host his own show on MTV, called The Jon Stewart Show, and then hosted another show on MTV called You Wrote It, You Watch It. He has also had several film roles as an actor. Stewart became the host of The Daily Show on Comedy Central in early 1999. He is also a writer and co-executive-producer of the show. After Stewart joined, The Daily Show steadily gained popularity and critical acclaim, resulting in his sixteen Emmy Awards.

Stewart has gained acclaim as an acerbic, satirical critic of personality-driven media shows, in particular those of the US media networks such as CNN, Fox News Channel, and MSNBC. Critics say Stewart benefits from a double standard: he critiques other news shows from the safe, removed position of his "fake news" desk. Stewart agrees, saying that neither his show nor his channel purports to be anything other than satire and comedy. In spite of its self-professed entertainment mandate, The Daily Show has been nominated for news and journalism awards. Stewart hosted the 78th and 80th Academy Awards. He is the co-author of America (The Book): A Citizen's Guide to Democracy Inaction, which was one of the best-selling books in the U.S. in 2004 and Earth (The Book): A Visitor's Guide to the Human Race released in 2010.