an actual UFO doesn't need to hide, and wouldn't. Anything that hides is man-made, even if it looks like a UFO.

These look like clouds- and no actual alien in a UFO is going to hide in a UFO shaped cloud of all things. The things you see on video from the STS shuttle cameras and other ships are the real deal, as they are right out in the open and move at their own speed, not attempting to evade the camera or onlookers.

You only hide when you have something to hide, and that reeks of humans. From all the accounts and encounters, there seems to be a good number of alien races, all with technology a thousand years or a million years more advanced than ours...and they seem to interact with people all the time, however they don't seem overly friendly or willing to really talk about themselves. Still, none of this would be happening if their plan was to keep out of the way and not be revealed- why abduct and leave memories and then hide by only coming out at night or by using clouds to mask your presence? Doesnt make any sense.

Like those big black triangle things--those are obviously OURS because you never see them in the day time and nobody has ever got a picture of one in the day. Something that moves only at night is definitely hiding, and is definitely of man-made origin. Why does something that came from another planet or dimension have to hide from us? They can walk through your wall, and take you up into a ship with a light beam, yet they have to hide?

I don't think so....

If in fact "cloudships" are indeed a feat of nature, it is one of excellence, but...You may never know, the resemblence it holds in relation to "UFO's" are almost uncanny. Either way, I wouldn't be surprised. There are many magnificent natural phenomenas of this planet, equal to that of this universe. To think one way would only eliminate the chances of existence on the other. Nevertheless, whatever it may be, it is indeed awesome.

it might be time to worry, but you'll notice, that they always seem to be in groups, and that's because the natural phenomena resposible effects a great area... It would seem that our space visitors have better means of camouflage than clouds anyways, as we have yet to down one on the old White House lawn...

seems unlikely, though kinda of a dumb way of trying to hide oneself, unless they knew that we'd think of a scientific explanation to dismiss any occourance, since humans are skeptical