This web site offers a physical and cultural description of the very human looking Grey aliens that is very similar to the one theoretically described on this web site. Three differences are apparent, however. First, this site concludes that the Greys are from the Alpha Centauri A star system and offers no evidence that they are of a hive soul sentient species. A description of the physical and psychological aspects of the alien grey lifeforms. Perhaps not space mobile.
Humans barely space mobile.
Perhaps not space mobile. Space mobile, body type still undefined. They live in houses that are harmonically imbedded into the countryside. The claim is made that they have been monitoring human development for the last 4,000 years. But such resolution is difficult to distinguish.