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After a long walk through the cool of the Cutivireni forest, past towering tornillo trees and mashonastes with their great buttressed trunks, dangling orchids and tree ferns – suddenly, a clearing.

These new sounds create a waveform that twists to a point like a screw — so the researchers called them tornillos, Spanish for screw.

It captures the mesquite and cat-claw thickets of tornillo bushes and encounters with the “wild and wooly” cow men of Roswell and Carlsbad.

Loggers were interested in the mahogany, oak and tornillo trees that grow to impressive heights in this part of the rainforest around Cutivireni in central Peru.