Rachni
Biographical information
Homeworld:	Suen
Status:	Formerly extinct (pre-2183 CE) Active
Physical information
Height:	1' (rachni worker) 5' (rachni soldier) 6' (female) 15' (rachni queen)
Skin color:	Red/crimson/maroon
Hair color:	No hair
Eye color:	Black
Lifespan:	4 years (workers) 30 years (soldiers) 150 years (brood warriors) 500 years (queens)
Distinctions:	Two antennae. Dual-eyes. Quadpedal. Capable of biotics. Forward-facing legs. Angular back. Levo-amino chirality. Two hearts. Four lungs.
Types:	Rachni Worker Rachni Soldier Rachni Brood Warrior Rachni Hivemonger Rachni Queen
Political and military information
Affiliation:	First Rachni Collective Citadel Council United Galactic Confederacy New Council Galactic Dominion Dominion Dissident Front Unified Republics of the Milky Way Second Rachni Collective
Nomenclature:	Tenebrae Reptilia Buggers
Notable:	Singer of the New Dawn Symphonic Exalted Composer of the High Note Musician of the Defended Vocalized Serendipity Many others

"Don't let their appearance fool you: these beasts are smart. Deadly. Tenacious. Resourceful and numerous, the rachni were known as boogeymen of the galaxy: before the Reapers, they had been the greatest threat the galaxy had ever seen."

— Human historian.

Rachni (Latin: Tenebrae Reptilia, literally meaning "dark crawlers") are a sentient/sapient organic quadpedal species native to their former homeworld of Suen and of the insecta classification. Achieving interstellar travel in 5234 BCE, the rachni rapidly expanded to thousands of worlds before they encountered the Citadel Council, where they were driven to the point of extinction. The rachni were initally seen as hostile and territorial, but have since been found to be peaceful and culturally vibrant, but capable of mustering extreme military might where possible to defend themselves.