“Crown shyness” is a real term that means the pattern a canopy of trees make against the sky. They seem to avoid touching, which is responsible for the pattern.
One theory is this is due to branches rubbing against each other and then breaking off, leaving the jigsaw-puzzle like patterns. Another theory is that the growing tips are sensitive to levels of light, and stop growing as they near the branch tips of other trees.
They’re better at maintaining good boundaries than humans are!
I never noticed tcrown shyness before, but now I’ll be looking for it whenever I walk in a forest or under a grove of tall trees.
Photos not taken by me. Credit: unknown.