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

<h4>Background</h4>Bornean orangutans (Pongo pygmaeus) currently occur at low densities and seeing a wild one is a rare event. Compared to present low encounter rates of orangutans, it is striking how many orangutan each day historic collectors like Alfred Russel Wallace were able to sho...

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Bibliographic Details
Main Authors: Erik Meijaard, Alan Welsh, Marc Ancrenaz, Serge Wich, Vincent Nijman, Andrew J Marshall
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2010-08-01
Series:PLoS ONE
Online Access:https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/20711451/pdf/?tool=EBI