Like a foodie hunting down a favorite taco truck, chimpanzees will travel further to their preferred fruit trees, says new study by researchers at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany. It's more than the fact that chimps enjoy good fruit -- the apes actively look forward to eating at the best trees, the primatologists found.
The scientists followed five female chimps through Tai National Park, a rainforest in Cote d'Ivoire, and marked the trees where chimpanzees most regularly dined. At these high-quality trees, apes most frequently let loose food grunts, an "aaa" sound that indicates gustatory pleasure (the chimpanzee equivalent of Instagramming your quinoa salad). They also ate a higher proportion of the fruit they plucked from these trees, too.