The Xenomorph Egg is the hive's primary reproductive organism, designed to remain dormant until suitable prey enters its detection range. Once activated, the egg opens into four fleshy petals, releasing a Facehugger that immediately seeks a living host.
Most eggs are produced directly by a Queen, forming the dense egg chambers found deep within mature hives.
When no Queen exists, the hive possesses a far slower emergency reproduction method.
A lone Drone may convert a captured living victim into a new egg through a horrific biological transformation known as Biomorphosis.
The victim is cocooned within hive resin while specialized enzymes, mutagens, and living hive tissue slowly restructure the body from the inside out.
Over approximately five days, bones dissolve, organs are repurposed, and the host's body is reshaped into a fully functional Xenomorph Egg.
The victim remains alive for much of the process.
Once complete, nothing recognizable remains.
Eggs created through Biomorphosis produce a Royal Facehugger rather than a standard Facehugger.
After successfully implanting its host, the Royal Facehugger dies shortly afterward, having fulfilled its singular purpose of creating a new Queen lineage.
The resulting Queen rapidly establishes a new hive, producing Guards and Drones to defend and expand the colony.
For isolated Drones, Biomorphosis is the species' final safeguard against extinction.
Standing roughly one meter tall, the egg possesses a leathery exterior reinforced by fibrous hive resin. Veins pulse beneath its surface, circulating nutrient-rich fluids that sustain the developing parasite inside.
When dormant, the egg appears almost lifeless.
Upon detecting nearby movement, body heat, or changes in atmospheric chemistry, the shell slowly unfolds into four fleshy petals, exposing the Facehugger within.
Once opened, it rarely closes again.
Xenomorph Eggs are not intelligent, but they are biologically responsive.
They detect vibration, movement, heat, respiration, and chemical changes in the surrounding environment. Hive pheromones prevent accidental activation by nearby Xenomorphs, allowing thousands of eggs to remain safely dormant within an active hive.
An egg can remain viable for decades—or possibly centuries—waiting for suitable prey.
Although stationary, a single unnoticed egg can begin the collapse of an entire colony.
Veteran Colonial Marines follow a simple rule:
Never assume the room is empty because nothing is moving.