剛再去確認了一下
果然BUTTERFLY一字的起源眾說紛紜
目前最常見的是彤影和我PO的這兩種
參考資料一
Butterflies probably get their name from the Brimstone Butterfly (Gonepteryx rhamni) which is bright yellow and one of the first species to appear in Spring in the UK. Hence butterflies were butter coloured flies.
參考資料二
How did butterflies get their name? Why are they called "butterflies"?
No one knows for sure, since the word has been in the English language for centuries (the word was "buterfleoge" in Old English, which means butterfly in our English today).
Because it is such an old word, we don`t really know who or when someone said "That `thing` over there is a `butterfly`." One story is that they were named so because it was thought that butterflies, or witches that took on the shape of butterflies, stole milk and butter. (Someone else wondered if the word was really meant to be "flutter-by" ). In other languages, the word for our fluttery friends has no such derivation as "butter" + "fly". One can only speculate on why the English language uses such an unlikely name.
Source: Dr. Paul A. Opler. U.S. Geological Survey, Emeritus Scientist.