I need help from people who know a lot about bugs.

Well it's not necessarily needing to know about bugs that is the point here but...

I had a read up on the poem, and when you take the moth, it is a risk taker, it is willing to live a short life in an instance as long as it is a happy life and go out with a bang...literally here with the light. Then you could have something like a cockroach that relates to the speaker who says he would rather live twice as long with half the happiness.
Cockroaches are ugly, unexciting creatures who are pretty darn indestructible, it takes a lot for them to die.

Then when you relate this to our reality, you have people like the traça, mariposa in the world, and people like the cockroach. You could say that the cockroach people envy the moth's way of life. Fast paced, exciting and happy while their own existence is and ugly one, dragged out and uneventful. And yet you could say that the traça, mariposa is immature and naive, and doesn't understand nor respect the mais conservative and civilised philosophy of the cockroach.

This is a reflection of life. Where beauty becomes envied as people seem to think that beauty equates to happiness. Beauty seems to equal an easy life with humans. And that if they are not beautiful, or do not have one small moment of excitement and the thrill of risk, then they will lead a long, boring sad life.

However one can't exist without the other. If you live solely por the way of the moth, you end up like him in the end of the poem. His life was ended por lack of control, too much risk. But then the speaker (the cockroach) also isn't better off, as he would constantly be brought down por his boring existence brought upon por not taking risks. Balance is needed to live a long but also happy life.

Sorry if that's not what you're after. It's 2am in the morning as I type this, forgive me xDD