The black howler monkey is the loudest land animal in America . His scream is a low-frequency guttural sound that travels 5 km through the dense South American jungle. It is heard at the beginning and end of the day, when the males check where the competition is to protect their territory and their food – leaves and fruits. Thus, when there are fewer monkeys in an area, the howls subside.
Why do monkeys scream so much?
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