It's because the world's best yodellers are monkeys, a study published this week in the journal Philosophical Transactions of ...

There, researchers recorded and studied the calls of various primate species, including the black and gold howler monkey ...

The monkeys' "ultra-yodels" had frequency leaps that were five times larger than human frequency changes, often exceeding ...

Researchers recorded and studied the calls of various primate species, including the black and gold howler monkey (Alouatta caraya), tufted capuchin (Sapajus apella), black-capped squirrel monkey ...

Yodelling monkeys can produce far greater frequency jumps than humans due to special structures in their throats, research ...