Dear Twilight,
I'm disappointed in you. Again.
To start, I saw these same creatures over in Trotsdale eating everything late this afternoon, but when I came to Ponyville earlier, Pinkie was busy parading them off into the woods while you were busy trying not to lose your cool like you didn't even know what was going on.
I don't question Pinkie knowing about the Parasprites. She knows too much as is, like the fact that I haven't celebrated my birthday since I banished my sister.
Side note, but tell her to stop stalking me on that matter. I will get around to that.
Anyway, what I do question is why neither you or Fluttershy bothered to research the Parasprite first if both of you knew nothing about it. She is the resident animal expert, you are the resident librarian, and yet it took Zecora to inform you of their voracious eating habits.
Fluttershy I can forgive as she may not know about all the creatures of the Everfree, but that's why we have books on the subject. I know you have a copy of "Pet, or Pest? A Compendium of Carnivorous, Cute, and Crazy Creatures" by Doc Danger somewhere in your library. Maybe it was right next to the copy of the other book you judged by its cover?
Actually, that's exactly what happened here. You didn't fully question what the Parasprite was right from the outset. Pinkie even knew exactly what they were, but you didn't ask her about them. You did learn these lessons before, right?
Well, maybe you were panicked over the whole situation. Discovering what were once cute pets can eat you out of house and home is something to worry over, but you must keep a level head on your shoulders when such a situation hits the fan.
In this case, you turned Parasprites into Paratermites that could actually eat your home. If Spike relieves himself in a corner of your library, I hope your first solution won't be to plug up the offending holes on him.
Your learned lesson was valuable; that I will not debate. But please think about your magic before you cast something tragic.
Love,
Princess Celestia
P.S. The Parasprites ate everything I brought with me but the moon cookies.
Yes, Luna. Your moon cookies, which I might add were surprisingly tasty.
Luna, calm down, okay? They're just bugs. They don't have good taste!
...oh dear.