Many times, pictures with optical illusions are fascinating to watch and not surprisingly when a challenge is thrown to spot the illusion and the photo is shared on social media, it goes viral as readers can't help but go all out to win the challenge. On Friday a Twitter user shared a picture and asked readers to help her spot a leopard in it. Twitter users took up the challenge as the photograph went viral.

In the picture, which at first glance, looks like a ditch filled with mud actually has a leopard hidden in the mud, and the big cat is impossible to spot. The image was shared by a Twitter user named Bella Lack with the caption, "Someone just sent this to me and asked me to find the leopard. I was convinced it was a joke... until I found the leopard. Can you spot it?"