The deer becomes the strongest visual distraction because its outline is immediately recognizable. Its head, body, legs, and overall shape allow the brain to identify it almost instantly, leaving less attention for the less obvious patterns surrounding it.
This type of hidden-image puzzle relies on perception rather than simply hiding an object. The face is technically visible, but the brain initially interprets its individual parts as unrelated elements of the forest.
Once the hidden face is discovered, the entire scene can suddenly look different. Shapes that previously seemed random begin connecting together, making the face much easier to recognize.
The real trick is therefore not simply finding the deer, but looking past the obvious subject. Can you spot the human face hiding among the snowy trees, or did the deer capture all your attention?