This Image Of Spotting A Cockerel Among Identical Hens Is 2017's The New Challenge 

Is it your brain or your eyes that's efficient?

With the lines reading SPOT THE DIFFERENCES, the brainteasers have the power to attract us easily.

Although in those, we have more than one chance to decide whether we win or lose, here, I have just a single image giving you a single chance to check your ability of solving a conundrum.