I feel like I saw the carrion-eating butterflies in at least one episode of Doctor Who.

I encountered the idea first in P.C. Hodgell's Kencyrath series, where the strictly carnivorous insects are known as jewel-jaws. They are actually a pretty good metonym for the way that world is full of casually horrifying beautiful things.

I also like the nosehair tool.

Yes! That was a magnificent parenthesis.