so from this skype call we can gather that
asari tentacles can move and they birth children through them. when the time comes for the child to be born the tentacles spread and out comes a child peacefully curled up n a ball covered in asari blood. and they don't breast feed, they mind feed. they stare intently into their infant and tell them to embrace the goddess every. day.
krogan are basically giant rollie pollies. they curl up into armored balls when provoked. that's also how they prove themselves to each other. specifically wrex and wreav.
drell can camouflage themselves into the ground like chameleons. thane did this alot when he was with shepard in the Normandy. out in the field, in order to avoid combat, he dropped to the ground and camouflages into the ground and skitters towards his enemies.
