Finally, I would also cite that a lot of butterflies die because they are a victim of predators. As you can see, there is no simple answer to the question how long butterflies live, but in general we can assume that an adult butterfly can live for a month. If you add the other stages of the butterfly life cycle (egg, caterpillar, pupa), they can survive up to a year.
1. Use commas to separate independent clauses when they are joined by any of these seven coordinating conjunctions: and, but, for, or, nor, so, yet. The game was over, but the crowd refused to leave. The student explained her question, yet the instructor still didn't seem to understand.
Both dashes and parentheses are used to set off interrupting comments, explanations, examples, and other similar parenthetical elements from the main thought of the sentence. Commas are ordinarily used when parenthetical or other nonrestrictive elements area closely related in the main thought of the sentence. Dashes and parentheses are used when the interruption is abrupt and the element set off is only loosely related to the main thought of the sentence.