Assertion: tapanuli orangutan | /r/AtLocation | danger
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text: According to the team’s population viability models, which take into account variables such as range size, life span (up to around 50 years), and how long it takes a species to reproduce (Bornean orangs have young every seven to eight years, Sumatrans every nine years), the Tapanuli orangutans could be in danger of dying out if they lose more than 1 percent of their population yearly.