The 28 th question of the hardest exam I’d taken since college was a smudged footprint pressed lightly into damp sand. The track possessed four teardrop-shaped toes and a vaguely trapezoidal heel pad; one toe, third from the left, jutted above the others, like a human’s middle finger. I knelt closer, scanning for the telltale pinpricks of claws, and saw none. That suggested feline: Cats, unlike dogs, have retractable claws, and they tend to walk without their nails extended. In my notebook, I wrote, tentatively, BOBCAT.
The hypothetical bobcat had been wandering a sandy floodplain in the California desert, where I found myself taking a wildlife tracking test one April afternoon. The evaluation was administered by Tracker Certification, the North American wing of CyberTracker Conservation, a South African non-profit that…
