&gt;&gt;&gt; &quot;Unidentified flying object&quot; means an aircraft, usually a military one (because civilian aircraft are easier to identify).<p>There are only so many military aircraft and drones.  They are relatively distinct.  Add to those a handful of properly-black projects and there are perhaps a hundred types in service.  Compare that to the thousands of civilian models out there, many of them very odd looking.  Things like Rutan&#x27;s VariEze get rather close to the flying-triangles.  And some very unique objects, including random light patterns, also fly in the civilian world.  So given the far greater number of civilian aircraft, outside of restricted airspace I&#x27;d say that most sightings are probably of strange but non-military flying vehicles.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Rutan_VariEze" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Rutan_VariEze</a><p><a href="http:&#x2F;&#x2F;www.hugeskyadvertising.com&#x2F;Scrolling-LED-Flying-SIGN.html" rel="nofollow">http:&#x2F;&#x2F;www.hugeskyadvertising.com&#x2F;Scrolling-LED-Flying-SIGN....</a>