black-capped squirrel monkey, and Peruvian spider monkey. Monkeys, scientists found, had a secret yodelling weapon; the primates possess special anatomical structures in their throats called vocal ...

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

black-capped squirrel monkeys and Peruvian spider monkeys. The spider monkey was the best yodeller, managing around four octaves, Dunn said. The researchers also studied the larynges of dead monkeys ...

By-Stephane-Thomas.jpeg) A mother Peruvian spider monkey and her baby in the Amazon ... I felt a lump in my throat. I stroked her black fur. That night, she wouldn’t let go.

These included the black and gold howler monkey, black-capped squirrel monkey and Peruvian spider monkey. A Peruvian spider monkey. (Dr Jacob Dunn/ Anglia Ruskin University/ PA) New World monkeys ...

Spider monkeys are large New World monkeys that live in tropical rainforests from central Mexico in the north to Bolivia in the south. There are seven species of these agile primates, which get ...