Field Frame Friday: High five! Oops! I mean high four?

Even though the black-handed spider monkey (Ateles geoffroyi) has limited dexterity in handling, since they do not have a thumb, they still show strong consistency and preference for handedness (aka being right or left handed). Their handedness preference also varies between individuals.

[Photo by Grace Davis and caption by Maggie Creamer]

Reference

Motes Rodrigo, A., Ramirez Torres, C. E., Hernandez Salazar, L. T., & Laska, M. (2018). Hand preferences in two unimanual and two bimanual coordinated tasks in the black-handed spider monkey (Ateles geoffroyi). Journal of Comparative Psychology, 132(2), 220-229. http://dx.doi.org/10.1037/com0000110

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