The Egg is roughly one meter in height and two feet wide with four
pedal-like lips at the top of it.  The  Eggs are laid by a Queen and have
root-like tendrils that extend from its base. When the Eggs are first laid the tendrils are very small but over time the tendrils grow in order to draw nutrients from the surrounding environment.It has been found that the Eggs can be held in a form of self status for thousands of years.Contained within the Egg is  a Facehugger along with fluid and other materials to sustain it. When an Egg detects a potential host, then the Egg will awaken the Facehugger, and the Facehugger will emerge
from the Egg once locating the host.

The Facehugger is roughly one and a half meters in length
(including its tail) with a long retractable tube-like organ that's hidden under a flap of tissue in the center of its "palm". When a potential host is found the Facehugger will use its tail to launch itself out of
the Egg at the potential host. If the Facehugger fails to attach itself
to the host it will use its six legs or fingers to move around in which
it can move surprisingly fast.  A Facehugger can also climb on walls like its full-grown kin.  Once a Facehugger attaches itself to a host it cannot be removed or else the host will go into a state of shock resulting in instantaneous death. The Facehugger while attached will alter its host's DNA so that the suppressant used to render the host immobile will not kill the host.  The sacs on the side of the Facehugger body allows the creature to breath for the host while it's attached. A Facehugger can stay alive while submerged in water and still breathe for the host because the two sacs act as filters; pulling in needed molecules and letting out by-product molecules. Due to the epidermis of the Facehugger they can survive in extremely harsh
conditions. The time it takes for an Embryo to develop is seventeen to twenty-four hours, and with a Queen Embryo the time is more than twenty-four hours which is  because of the Queen's more complicated structure and the use of Royal Jelly(explained later).  Once Embryo implantation is complete the weak Facehugger will detach itself from the host and crawl away until it dies. The blood is neutralized upon death rendering the Facehugger harmless. The life span of a Facehugger is unknown.

Phase 3  is known as the "Chestburster"  a few hours after the facehugger has died the "Chestburster" awakes and escapes from it's host by the quickest exit point.  In a human this is through the sternum.  The creature explodes through the ribs and tissue and finds a warm damp environment in order to quickly grow into a full size creature.  The Chestburster moves by using its tail to push itself along.  It's metabolism id higher than any creature we have seen before as it take three hours for it to reach full size

This is the most common creature that we have encountered a researched.   This variant of the creature is smarter than others encountered and  uses stealthier tactics when in combat.  The Warriors are the loyal subjects of the queen who has control over them all much like an ant queen they communicate by the use of pheromones and a telepathic ability.  We have yet to find ways to manipulate the telepathy to our advantage but we are close to a major breakthrough. 

The human creature is generally bipedal due to the human DNA.   The Adult Xenomorph posses the ability to climb on walls and ceilings.  The creature has four spine like appendages extending from its back these contain glands that secret a resin which is used to construct a hive.  The secondary jaws of the Alien which are part of a modified tongue are used in an offensive manner and can spring twelve inches outward from the Xenomorph's mouth. The second set of jaws primary purpose is immobilizing a potential
host but they can also be used to frighten hosts and activate buttons. The tongue's tensile strength is greater than bone, and once it reaches its maximum length its jaws close and its tongue is retracted.
The Xenomorph's tail is very powerful and it's used for agility and balance, an offensive and defensive weapon, and immobilizing potential hosts with its stinger. In aquatic situations it allows the Adult Xenomorph to move with spectacular grace and agility.

The Queen is about four and one half meters tall with an extremely powerful tail that is equal in length to the Queen's height. It possesses a large cranial crown which extends two meters behind the back of its head, and it has a second set of smaller arms. The Queen's head is kept hidden in its cranium until awakened in which at that time it will emerge much like a turtle This is used to extent the range of the queens telepathic abilities to the hive and surrounding area.  The total distance of control has yet to be determined. The secondary jaws of the Queen are just like the Adult's secondary jaws except they're proportionately bigger with a striking length of
thirty-six inches. The Queen has an ovipositor which can reach a length of eight meters.   Both the Queen and its ovipositor are suspended from the roof of a
hive by thick strands of resin. The total egg laying capacity of the Queen is approximately three hundred and forty. From the end of the ovipositor an egg is set down onto the floor of the hive. The Queen is responsible for making Queen-bearing Eggs it starts producing them  when a Queen's Egg laying abilities are at an end the next Queen born takes over.  It has been shown that when a new queen is born due to the old queen finishing its egg cycle the drones turn on the old queen using here remains to expand the hive and control shifts to the young queen.