Scavenging is both a carnivorous and herbivorous feeding behavior in which the scavenger feeds on dead and decaying organic matter present in its habitat.

Gigantism is an evolutionary survival strategy, especially for herbivorous animals, because size is a form of defense against predators," Apaldetti said.

The hippopotamus is a semiaquatic, mostly herbivorous mammal.

Manatees, also known as sea cows, are large, aquatic and mostly herbivorous marine mammals.