5. The Northern brown howler monkey (Alouatta guariba guariba) is now restricted to one area north of Brazil’s Rio Jequitinhonha. It is unlikely that more than 250 mature individuals remain.
Thanks to conservationists’ work, no primate species were declared extinct in the 20th century. So far, no primate species have been lost in the 21st century but whether that will remain the case is for grabs. Some of the primate species noted in the Primates in Peril report are “very close to total extirpation”: It’s up to us to ensure that they do not disappear from the face of the earth.
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Photo by Bart vanDorp
Photo of the Northwest Bornean orangutan (Pongo pygmaeus pygmaeus) by Tim Sträter
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