There are lots of great answers here so I want to post something entirely silly and much much more recent:
About 8-9 years ago someone on Reddit transcribed and revised the entirety of Edgar Allen Poe’s The Raven to instead be about an Emu.
For the life of me I have never been able to find it again.
Good luck. It wasn’t a post, it was a top level comment and I have a dim memory of it only being slightly related to the post topic.