I think its purely archetypal,
Notice how its often decsribed as "crow-like" too?
Crows are often considered to be omens, guides, and relating to death, by the general masses that is, in occult circles the crow has always been significant.
Okay this being has appeared to many before a disaster, or during.
Yet it is blamed for the disaster? I always thought Chernobyl was caused by a big old man-made c*ck-up..
I wouldnt suggest that this creature is a form of precog made thoughtform, on an unconscious level, by ourselves, or perhaps of others who know more about what they are doing on the conscious level also, know what I mean? *wink wink, nudge nudge*
I don't think its malevolent at all, just seen as.
Oh and the crow link..My 12 year old daughter dreams of a crow alot. She's a very "open" child so is able to relay these experiences with me in an honest and trusting manner, not to be taken for granted you know?
Anyway, her usual crow dream consisters of her standing in a field, a barren expanse of dead grass, and seeing a huge crow in a dead tree looking at her with huge amber eyes (amber protection right?) he swoops over and picks her up in his tallons gently and carries her to another field strewn with the dead, of all eras spanning back to primitive dress, and they stand up and talk to her. She sees an aircraft with "soldiers" strewn around its burning shell, and they stand up too and warn her of something but she can't remember.
Since that dream first started the crow always comes to her when something is about to happen..she tells me. You know she isn't scared of it either.
This is why i'm thinking this "Mothman" might not be as seperate from us as we think, perhaps it maintains it's enigmatic stance so that we will take more bloody notice

Imagine you were the mothman? Look at all these people staring at me and not one of them has figured out why i'm here, grrrrr, how many times have i got to do this?