Prior to 2012, the Sumatran elephant was "endangered," but not critically.
The Sumatran elephant thrives in lush forests and can weigh up to five tons.
In 2012, the species was categorized as "critically endangered" by the WWF. Due to habitat decimation, half of its population was lost over the course of one generation, and the WWF estimates that between 2,400 and 2,800 remain.