Contained within the below pictures is one of the largest land mammals on the planet, the largest sea mammal and a creature famed for its vibrant appearance.
The fact that they aren't immediately obvious is precisely the point that the World Wide Fund for Nature is hoping to put across.
Each of these Magic Eye-style posters hides an endangered species, the plight of which WWF is looking to draw attention to before it disappears forever. The blue whale, polar bear, green sea turtle, hummingbird and Sumatrian tiger, "are each becoming harder to see", writes each poster.
Created by Dubai-based ad agency TBWARAAD, you can find out more about WWF's ongoing work here.
Now, prepare to get some funny looks from the rest of the office as you attempt to spot each creature. To make it easier, try clicking each image to open it up in a fresh tab and resize it to your screen height.
