
To me this tree looks like it is whistling at someone.
Essentially, pareidolia is seeing something, like a face, in something that is not a face - like a tree, or a rock. It is similar to when you see familiar shapes (like a dragon or a bunny) in the clouds. Whatever it is - the subject is evident (we can label it), but the thing that is being photographed is NOT...a face, a bunny, a dragon, etc.
To me this tree looks like it is whistling at someone.