Chimps at the Chimfunshi Wildlife Orphanage Trust (CWOT) engage in a wrist-to-wrist grasp while grooming.
Chimps Groom and Grasp
Two groups of chimpanzees at CWOT engage in hand-clasping behavior, but only one does a wrist-to-wrist grasp.
Chimpanzees groom one another while grasping hands palm-to-palm.
Chimpanzees in a wrist-to-wrist grooming grasp.
Not all groups of chimpanzees engage in hand-holding, suggesting that the practice might be cultural.
Young Chimp Grooming
A young chimp at CWOT grooms with hands held high.
Stephanie Pappas, Live Science Contributor
Stephanie Pappas is a contributing writer for Live Science. She covers the world of human and animal behavior, as well as paleontology and other science topics. Stephanie has a Bachelor of Arts in psychology from the University of South Carolina and a graduate certificate in science communication from the University of California, Santa Cruz. She has ducked under a glacier in Switzerland and poked hot lava with a stick in Hawaii. Stephanie hails from East Tennessee, the global center for salamander diversity. Follow Stephanie on Google+.