Reptilian beings who are said to have established colonies in Alpha Draconis. Like all reptilians, these claim to have originated on Terra thousands of years ago, a fact that they use to 'justify' their attempt to re-take the earth for their own. They are apparently a major part of a planned 'invasion' which is eventually turning from covert infiltration mode to overt invasion mode as the "window of opportunity" (the time span before International human society becomes an interplanetary and interstellar power) slowly begins to close. They are attempting to keep the "window" open by suppressing advanced technology from the masses, which would lead to eventual Terran colonization of other planets by Earth and an eventual solution to the population, pollution, food and other environmental problems. Being that Terrans have an inbred "warrior" instinct the Draconians DO NOT want them/us to attain interstellar capabilities and therefore become a threat to their imperialistic agendas.
Pleideans
Blond or in some cases brunette "Nordic" type humans based in the Pleiadean 'Taygeta' and other systems which were allegedly colonized by refugees from their former planetary abodes in the Lyra constellation which were invaded by the reptoid entities from Alpha Draconis. The Pleidians are highly evolved,spiritual,benevolent variety and have a kinship toward humans and are the only aliens to be truly trusted by earth humans at this time. They had at one time offered to be of assistance to earth leaders in dealing with the alien situation here,but were rebuffed and so have taken a kind of "hands off" approach for the time being. These aliens are supposedly the forefathers race of humankind.
Zeta Reticuli
This is the type most commonly referred to as the greys. They come from the Zeta Reticulan star system (the Bernard star) neighboring the Orion area. They function in a mode that is apparently military in nature with a rigidly defined social structure that holds science and "conquering worlds" to be the prime movers. They are normally about 4.5 ft tall with large heads and black "wrap around" eyes. They have limited facial features, slit mouth and no nose to speak of. They have evolved beyond the need for reproductive systems or digestive systems and reproduce by cloning. Their genetics are partly based on insectoidal genetics.