What is the loudest call monkey in world?

There isn't a single "loudest call" monkey in the world. It's hard to objectively measure the loudness of animal calls across different species, as their calls are often complex and have different frequencies that our ears perceive differently.

However, some monkeys are known for their incredibly loud and distinctive calls:

* Howler Monkeys: These monkeys are famous for their incredibly loud howls, which can be heard over miles of rainforest. The males have a special resonating chamber in their throat that amplifies their calls.

* Proboscis Monkeys: The males of this species have a large, bulbous nose that they use to produce a booming, trumpet-like call.

These are just a few examples, and many other monkey species have incredibly loud and distinct calls. Ultimately, which monkey is "loudest" is subjective and depends on how you define "loud."