It’s Drone Vs. Raven as Scientists Fight to Save the Threatened Desert Tortoise

Tim Shields spends a lot of time in the Mojave Desert. Sometimes, he camps out there for weeks at a time. As a desert biologist for nearly 40 years now, Shields doesn’t mind the extreme high and low temperatures that the California desert presents. He’d rather gaze at the desert night sky than a dull hotel room ceiling fan.

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