Declining orangutan encounter rates from Wallace to the present suggest the species was once more abundant.

por Erik Meijaard, Alan Welsh, Marc Ancrenaz, Serge Wich, Vincent Nijman, Andrew J Marshall
Publicado 2010

Envisioning a future for Bornean orangutans: Conservation impacts of action plan implementation and recommendations for improved population outcomes

por Julie Sherman, Marc Ancrenaz, Maria Voigt, Felicity Oram, Truly Santika, Serge Wich, Erik Meijaard
Publicado 2020