Land-cover changes predict steep declines for the Sumatran orangutan (Pongo abelii)

Wich, S.A., Singleton, I., Nowak, M.G., Atmoko, S.S.U., Nisam, G., Arif, S.M., Putra, R.H., Ardi, R., Fredriksson, G., Usher, G., Gaveau, D.L.A., Kühl, H.S.. 2016. Land-cover changes predict steep declines for the Sumatran orangutan (Pongo abelii) Science Advances, 2 (3) : e1500789. https://doi.org/10.1126/sciadv.1500789

New surveys provide higher estimate of Sumatran orangutans than previously, but future scenarios indicate decline continues.