“Butterflies flutter by” is a phrase most native English-language speakers know, though they (butterflies, not native speakers) don’t flutter due to ineptitude, scientists figure - they are quite able to fly rapidly in a straight line when need suits, but in order to confuse predators, scientists have noted, their flight pattern when feeding is as random as anything ever measured.
(I will refrain here from comparing butterflies with my daughter.)
Butterflies lay eggs on the particular plant their larvae, known as caterpillars, will feed on voraciously as they grow rapidly; they then metamorphose, fly away, and thereafter never call or text unless they need something (I will again refrain here from comparing butterflies with my daughter).
Attached is a guide for identifying butterfly types common in Japan which is useful as it allows one to identify species by color. (Just memorize the Japanese names of one or two species and use them at random to impress your Japanese friends, who likely won’t know any better - and, again, I will refrain here from bringing up my daughter). - William