While hunting along the river in the Pantanal, this jaguar became irritated by a swarm of flies circling the fresh wounds on her forehead—scars from a recent fight with a caiman. In a sudden burst of motion, she swatted at the insects, sending water exploding around her. I was fortunate enough to catch this fleeting behavior, a raw glimpse into the daily challenges faced by one of the world’s most powerful predators.