The Greys are a species from Zeta Reticuli 2, Bellatrax and Orion
the most popular greys, are said to have evolved in a society where emotions were supressed, leading to a crisis, and a threat to their survival, so they came to earth searching for our DNA material(composed of 22 ET species) to create hybrids that would assure their survival
they also perform tasks for their masters, the Reptilians or Draconans(royalty) like abducting people for them or monitoring and control
they are mostly a negative race except some zetans and children looking ones
The Ancient Mantis are an old and rare branch of Greys
These Beings have long, narrow faces, with long, narrow, large eyes, sharply slanted upward and outward in an almost narrow-V position, given an almost insect-like appearance. This comparison is heightened by the Praying-Mantis types' extremely thin, long torsos, long, extremely-thin arms which are usually crooked into a sharp bend at the mid-joint, with the hand and fingers/mitten sloping almost vertically downward from the "wrist", and legs also bent at an almost right-angle at the mid-joint, creating a crouched pose. The overall effect is the characteristic "Praying Mantis" look. It should be noted that experiencers feel that this type is no insect, but rather an intelligent, gentle-spirited, but somewhat "hyper" and jerky-moving, human-like lifeform. There are both males and females.
they are so evolved they live off the energy of light, also they are telepathic
The Reptilians, with their Royalty the Draconans, who are malevolent beings that came from another universe, in fact they were dumped here, they claim this universe as theirs and they seek control and domination, they colonize and enslave many planets, are warriors and also genetic engineers, so they find life forms in planets and alter them to create races to serve them.
they dont want other races to evolve and raise to higher dimensions, so they control and manipulate so that they are regressive like them, they are concerned about earth becaused they know we are primitive hunters, warriors like them and see a threat in us using space travel to colonize other planets so they control us and are here for that purpose, they consider the earth as one of their planets, a number of them are underground and in high leadership positions(cloaked), and want us to kill each other in wars and create tensions and rivalries so that we are not united as a race and dont raise to the next dimension (4th and 5th)