bot
src: Renard, Louis. _Poissons, ecrevisses et crabes_. 1754. https://www.biodiversitylibrary.org/item/200575
"Audubon painted a handful of birds that aren’t an exact match for anything we’ve currently got. These are Audubon’s mystery birds."
https://www.audubon.org/news/john-james-audubon-crazy-wrong-or-neither
@cameron 9% seems like a good percentage to aspire to.
"All of the species depicted in Louis Renard’s _Poissons, ecrevisses et crabes_ received some level of artistic embellishment – and approximately 9% are completely fantastical. If that’s not strange enough, the work is produced by a man who identified himself as a 'secret agent on behalf of the British Crown' and contains a portrait of a mermaid."
https://blog.biodiversitylibrary.org/2016/08/renards-book-of-fantastical-fish.html