Arrau

Known locally as the arrau or tartaruga da amazonia, the giant South American river turtle lives throughout the Amazon and its tributaries.

But that’s not the case with the arrau.

The team recorded a wide repertoire of whisper-quiet calls from arrau of all ages.

Researchers are now racing to count how many arrau turtles remain in the wild.

And a continued appetite for turtle meat sustains a lucrative illegal trade, where middlemen can buy an arrau for $50 and sell it downriver for $450.