At first glance, all four deer appear completely identical. Same antlers, same body shape, same stance.
But one of them is different.
This simple-looking puzzle has been confusing people online because the difference is much smaller than most expect. Many viewers spend their time comparing the antlers, ears and legs, convinced the answer must be hidden somewhere in the more complicated parts of the drawing.
That’s exactly what makes the challenge so tricky.
Our brains naturally focus on larger details first and often overlook the most obvious things sitting right in front of us. As a result, many people confidently choose the wrong deer before taking a second look.

If you haven’t found it yet, focus on the back of each animal rather than the head.
The correct answer is Deer #2.
Unlike the other three deer, Deer #2 does not have a visible tail. It’s a tiny missing detail, but it’s enough to make it the only deer that doesn’t match the others.
Did you spot it immediately, or were you distracted by the antlers like most people?