Megafauna

thumb|320px|The African bush elephant (foreground), Earth's largest extant land animal, and the [[Masai ostrich (background), one of Earth's largest extant birds]] In zoology, megafauna (from Greek 'large' and Neo-Latin 'animal life') are large animals. The precise definition of the term varies widely, though a common threshold is approximately , this lower end being centered on humans, with other thresholds being more relative to the sizes of animals in an ecosystem, the spectrum of lower-end thresholds ranging from to , the latter largely restricted to megaherbivores. Large body size is gene

mass extinction event, around 10000 BCE, marking the end of the Pleistocene and the beginning of the Holocene, during which many megafauna species went extinct; hypothesized to be caused by human hunting and/or natural climate change

large animals in Australia, past and present era

rewiliding featuring the reintroduction of extant Pleistocene megafauna or close ecological equivalents

large animal species with symbolic value or widespread popular appeal, used by environmental activists to achieve environmentalist goals