[quote=@Zarkun] Missile towers and other StarCraft detectors would detect them considering from what I know of the Genestealers, they function similar to a Zerg Changeling. Good luck, mate :) EDIT: I'm not sure how missile turrets do it, biometric scanners I think. [/quote] Well that's not fair cause those are Zergs and these are nids, though it's close enough so I can deal with it. [b]But [/b] Changeling 'shapeshift' to look like them not actually becoming them. The missile turrets have no explanation on how they can see them. I'm sure it's just a balancing thing since Zerg entire lore is built around them being in that game. [quote]The changeling, composed of a protoplasmic substance, is capable of shape-shifting into a form resembling a terran. It can shift between specific appearances. It can even send out psionic impressions leading terrans to believe that everything is "all right". [/quote] They fool them by looks. Genestealers become part human after birthing them. So they still have human DNA and the newer the generation the closer they are to their host Race. Edit: Like red said, the whole thing would take generations and that would take forever. So, they'll just be used in interior areas where they shine as bright as their claws.