What is a Xenomorph?
Aliens, also known as Xenomorphs to differentiate them from the general term, are extraterrestrial lifeforms that use other living beings as a host during their life cycle. With black carapaces and wicked sharp claws, powerful night vision and the ability to see people through walls, xenomorphs are extremely dangerous. They are intelligent and capable of speaking to one another via a hivemind channel with :a. In comparison to Earth species, xenomorphs are closest to parasitic wasps that live in colonies with queens and require another lifeform to gestate inside.

Xenomorph Lifecycle
Xenomorphs start life as an egg laid by a queen. This egg takes five minutes to develop, at which point it will automatically hatch. Xenomorphs are all female, but still reproduce asexually. Queens can lay eggs, but these eggs cannot develop into adults on their own. In order to get the other half of their genetic code they implant embryos within other life forms and use their DNA. From the egg, the next stagEverything taken from wikipedia