Because the caterpillar is an intermediate stage of the development. It will go through something called metamorphosis after which it will look like its parents. Think of the caterpillar like a sort of mobile egg, which doesn't look much like its parents either.
Butterflys always started out as caterpillars. By "back then" I dont know what you might intend.
just like caterpillars
They look like Monarchs
tiny
Because they dont want to look like a idiot
Northern minnesota caterpillars can vary. Some are fuzzy, black and yellow as a bee. Some can look alll green as grass.
want do they look like
Monarch butterfly caterpillars are yellow, black, and white striped and grow to be about two inches long before they pupate.
Many caterpillars make cocoons that look like sticks. They look like little bundles of tiny twigs, and the caterpillars use them as they transform into butterflies.
Caterpillar larvae look like segmented worms with almost invisible stubby legs.
useally they have the color red somewhere on their body
The caterpillars that look like sticks are called Geometridae. These markings and looks of these caterpillars allow them to blend in and stay safe from enemies while in the trees.