Black triangle (UFO)
Black triangles are UFOs reported as having a triangular shape and dark color, typically observed at night, described as large, silent, hovering, moving slowly, and displaying pulsating, colored lights which they can turn off. == British sightings and UK Ministry of Defence Report == A declassified report from the UK Ministry of Defence, addressing Unidentified Aerial Phenomena (UAP) within the UK Air Defence Region and code named Project Condign, includes analyses of black triangle sightings.