The “big truck, small man” phenomenon is also seen in the animal kingdom. The loudest howler monkeys were found to have the smallest packages. Hyoid bone size, which is responsible for vocalizations, ...
Alejandro Zúñiga / The Tico Times. To many first-time visitors to Costa Rica’s varied forests, mantled howler monkeys are the first indication that they are somewhere wild. Often heard before they’re ...
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