Mantelaffen (IMAGE) University of Zurich Caption Like these mantled guerezas, all primate species learn their respective manual skills in exactly the same order. (Image: Sandra Heldstab, Toni's Zoo, Rothenburg) Credit Sandra Heldstab, Toni's Zoo, Rothenburg Usage Restrictions Credits must be: Sandra Heldstab, Toni's Zoo, Rothenburg License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.