Most butterflies is a phrase that refers to the majority of butterflies. However, there are different antonyms for this phrase, depending on the specific context. One opposite of most butterflies could be "few butterflies," indicating that only a small number of these insects are present. Another antonym could be "least butterflies," highlighting the least important or smallest segment of the butterfly population. Additionally, "rare butterflies" could be an antonym, referring to only a few species that are not commonly found. When discussing butterflies in terms of size, the antonym for most butterflies could be "smallest butterflies," indicating the tiniest species.