Megaherbivore
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Megaherbivores are large herbivores that can exceed 1,000 kg in weight. The earliest herbivores to reach such sizes like the pareiasaurian reptiles and dinocephalian therapsids appeared in the Permian
The common hippopotamus is an extant megaherbivore.
Skeleton of Paraceratherium, a rhinocerotoid
Giraffe calves do not stay with their mothers, they sit down and hide for most of the day, and their mothers briefly visit to feed them.
Black rhino calves are vulnerable to predators, and stay close to their mothers for safety for 26 to 40 months.
Megafauna
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In zoology, megafauna are large animals. The precise definition of the term varies widely, though a common threshold is approximately 45 kilograms, this lower end being centered on humans, with other
Megaherbivore
…They include both terrestrial and marine herbivores (i.e., manatees and dugongs), and are classified as the largest type of (herbivorous) terrestrial megafauna. The Early Permian caseid synapsids have been described as among the first megaherbivores. Other major groups of Permian megaherbivores include…
The African bush elephant (foreground), Earth's largest extant land animal, and the Masai ostrich (background), one of Earth's largest extant birds
Baleen whale comparative sizes
Diprotodon optatum
"Megalania" (Varanus priscus)