India, Sept. 1 -- Optical illusions are all the rage on the internet, and Reddit's FindTheSniper has several enthusiasts sharing difficult and mind-bending challenges. One such viral image has left Redditors confused and amused at the same time. Shared by rastroboy, the image features a camouflaged squirrel that has left thousands of users squinting at their screens.

The picture looks simple: a big tree trunk, a hanging bird feeder, and some greenery in the background. But somewhere in there, a squirrel is hiding, almost invisible at first glance.

People online have been staring at it for minutes, some even longer. Most thought they would catch the squirrel sitting by the feeder or on the ground. Instead, the animal blended itself so pe...