It would be disingenuous not to admit that BF sightings are correlated to an extent with UFO sightings, particularly (though not exclusively) outside the PNW. To what extent these phenomena should be regarded as physically or psychically connected, or if the two should be thought of as separate if consonant phenomena, is difficult to determine. Obviously the UFO (and, generally, paranormal) connection to BF phenomenalism is a significant obstacle to the plausibility of eyewitness accounts, and a partial impediment to the credibility of the physical creature hypothesis as a whole. Yet it does exist. And it could be the case that UFOs are bona fide physical events and there may be some explanation for the correlation with a physical BF. It is not beyond conception that there may be interstellar travelers who are exploiting as-yet-unknown physical laws to visit earth within a reasonable time frame, and if this is occurring, the purpose of these aliens is as opaque as providence itself. As my signature says, once you eliminate the impossible, whatever is left, no matter how improbable, must be the truth.