THIS odd optical illusion has been stumping even the most hawk-eyed of puzzle fans.
Everyone can see the human faces, but you need the IQ of a genius to spot the 11 different animals hiding away somewhere in this image.
Yes, you read that right, there's 11 animals in there.
And for those puzzle-heads among you, there's an added catch: you have to try and find all eight objects within 18 seconds.
So, grab a timer, set it to 18 seconds, and prove your puzzle-solving abilities.
Although it may seem like an ordinary image, this is no easy feat and 99 per cent of people give up before they find all 11.
read more optical illusions
Once onlookers move past the human faces, it's easy to spot the elephant and the fish.
The tricky part is spotting all of the animals within the timeframe.
Optical illusions like this are purposefully designed to trick our vision, and can be used as simple determiners of intelligence.
Optical illusions benefits
RESEARCHERS have developed many tests that show how various brain regions react to optical illusions.
They are not only entertaining, but they also shed light on how our brains interpret visual data.
By giving your brain a little workout on a regular basis, you enhance your ability to focus and observe details.
Studies have shown, people who regularly challenge themselves with optical illusions and puzzles see big improvements in their problem-solving skills, concentration and attention.
Improved concentration and attention span, in turn, can help prevent cognitive decline in older age.
Psychologists at The University of Glasgow found that staring at an optical illusion can improve eyesight by allowing you to see small print.
The animals tucked away somewhere in this image include an elephant, two pigeons, two fish, a crane, a swan, a cow, a rabbit, a snake and a wolf.
Most read in The Sun
This puzzle has been made particularly tricky through the lack of colours throughout the image.
The artistic detailing that has gone into this illusion offers the perfect camouflage for the animals, as your eyes find it hard to focus on any one object.
Have you found all 11 of the images yet?
If you'd like some more help, try breaking the image down into several sections. Then search each section slowly, one at a time.
Or, if you found this puzzle too easy, why not try some of our other brain teasers?
Can you spot the perfectly camouflaged critter in this seemingly ordinary image of a bright yellow flower?
Only the most seasoned puzzlers with eyes of hawks have been able to spot the bug within five seconds.
How about this image of a family decorating a tree with cards?
Everyone can see the dog, but you need to have 20/20 vision to spot both the hidden work and the pumpkin within 12 seconds.
READ MORE SUN STORIES
If you couldn't find all of the objects within the harshly allocated time of just 18 seconds, don't worry, we have the answer for you.
We've also added three bonus puzzles for you below.