Butterfly eggs range in size from nearly microscopic to the size of a small BB. Butterfly egg colors range from burgundy to green to cream to white. Butterfly egg shape ranges from round to oval to sharp tall oval to squat round to … many shapes. Butterfly egg texture ranges from smooth to rough, bumpy to spiky, and more. Some eggs have scales stuck to them, sticking out like a crazy haircut. Eggs often change color before they hatch. Swallowtail eggs develop a dark ring around them before they hatch.