mangabey images - Joel Sartore

A black crested mangabey (Lophocebus aterrimus) at the Chattanooga Zoo.

A black crested mangabey (Lophocebus aterrimus) at the Chattanooga Zoo.

A black crested mangabey (Lophocebus aterrimus) at the Chattanooga Zoo.

A black crested mangabey (Lophocebus aterrimus) at the Chattanooga Zoo.

A Black crested mangabey (Lophocebus aterrimus) at the Chattanooga Zoo.

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National Geographic Photographer and Speaker