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The Tehuelche were innovators, too: Outsiders marveled at their bolas, weighted rope snares they swung and launched from horseback to hunt llamalike guanaco and flightless rhea birds.

And they question whether translocated guanacos, which are adapted to Patagonia’s harsh environment, will thrive in their new homes, which have different ecosystems.

In older layers of the guano, genetic traces of native animals such as guanacos—the wild descendants of local llamas—and beached marine creatures dominate.

He pointed out wild llama-like guanacos grazing on the steppe, a gray fox running across the road, and caracara falcons perched on the fence posts.

Maras and desert-dwelling penguins are featured and baby guanacos are shown taking their first steps.