Why are butterflys call butterflys?

Answer 1

That's not the scientific name its only a common name, each specific species of butterfly has its own name, binomial nomenclature. Binomial nomenclature is the naming of a specific organism, the first word being the genus labeling the the exact species then getting into more detail based on size, coloring, flight distance, etc. The Anglo-Saxons used the word 'butterfloege' because their most common butterfly was the yellow brimstone butterfly. This English influence was brought to the new world.