A Brutal Storm Over Savage Valley

Lone caribou runs through tundra. No escape from invisible predators. Warble fly is common in Denali National Park. They lay their eggs in the nose and throat of the caribou. Larvae hatch and bury themselves underneath the caribou’s skin or into the lining of the stomach or intestines. Without opposable thumbs, little can be done once an infestation has taken hold.

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