The Zeta Reticuli Grays... have an insect-based genetic system and are about 3.5 to 4.5 feet in height.  They have no external genitalia.  They are less aggressive toward humans than the other Gray species.  These beings are from Zeta Reticuli in the Reticulum Constellation.  They have very distinctive facial features with a turned-up nose and long slender neck.   The Reticulans appear to be a highly aware grouping of entities that function as a social memory complex.  Individuality appears to exist, but is overshadowed by the group mind...  The Reticulans are millions of years old as a species and have a weakened DNA structure as the result of conflicts which involved nuclear radiation.  The Reticulans have relied on artificial reproduction or cloning and face extinction from incurable diseases.  They are creating hybrid human-Reticulans capable of mating with humans.            The Reticulans are largely involved in scientific exobiological surveys as well as systemic geological observation and field studies.  Their civilization appears to be totally dedicated to interstellar research and life analysis.  The Network has been on Earth for the past 50 years.
The Zeta Reticulans appear to be divided into two social classes, one being more "hawkish" than the other.  The more peaceful of the two appears more refined and has demonstrated a more tolerant attitude toward humans.  The other class is more abrupt, blunt, and crude toward humans... The taller Grays seem to have overall influence over the Reticulans.          The Zetas have apparently reproduced themselves for thousands of years by the cloning method.  They have devolved from the sexual reproduction process so that all sexual organs (as well as their digestive tract) have totally atrophied. They have no stomach and digest their food by absorption through the skin or under the tongue.  The mouth cavity is approximately 2 to 3 inches in depth.         These are the entities that are involved (the government is also involved) in cattle mutilations.  They absorb specific substances from the cattle products that seem to lend stability during the cloning process.  These substances originate in certain glands and mucus membranes (lips, nose, genitals, and rectum).          The problem that these entities have come to experience is that in the re-cloning process each copy is genetically weaker than the last.  This has stimulated their interest in the creation of a hybrid through genetic engineering with human genes, trying to merge and blend the species in order to preserve their race.  It is for this reason that the Zetas abduct humans.