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Can you spot the 'invisible animal'? Incredible images show nature's disappearing act when predators are near
- These animals are trying their utmost to fool predators by blending into landscapes all over the world
- They were taken by photographer Art Wolfe over a period of 35 years, for his work 'Vanishing Act'
Cunning tricks: A Great Horned Owl uses colour in its plumage to disappear in a temperate forest in Malheur National Wildlife Refuge in Oregon, while an American Pika performs a vanishing act in the Cascade Range of Washington.
Rock and hole: A gyrfalcon at their nest built on a cliff, and a California Ground Squirrel blends in with its rocky environment.