So, looking for scary face pictures for Halloween profile pics, and this is in the top of the search. Okay then Google, keeping it relevant to the times I guess.
Month: October 2018
RDR2: 200 Animal Species and Legendary Animals
Currently, at Rockstar’s official page for Red Dead Redemption 2, there are a few species listed with images. These images (see below) look like illustrations from a book, possibly in game or in a guide. In close inspection you can see the images have page numbers. Showing an order and numbered list of all animal species in game.
At or around 200 species, 
“RDR2: 200 Animal Species and Legendary Animals”