If an owl flies in a forest...
Rhetorical question: If an owl's flapping its way between the low hanging branches of a stand of lodge pole pines in an Alberta forest and no-one's there to hear the movement of its wings, does it make a sound?
Good thing the camera's lens captured the owl's approach. With it's specially modified wing feathers featuring leading and trailing edge micro-size hook-and-frond 'spoilers', the owl, in most likelihood, was flaring toward the CCTV unit on soundless wings.
Just like the hunter crouching quietly on a tree stand who almost falls off his ledge in surprise when an owl suddenly glides past the hunter's perch. Like bullets, it's the ones you don't hear that get you....
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