The training images for this are mainly engravings by medieval artists, who had never seen the animal they were drawing. I threw in one flying spaghetti monster, several creatures that never existed, and an owl that's just seen your browsing history.

My first attempt at training didn't really fly, so I tried auto-tagging this time. Maybe it makes prompting easier, I'm not sure.

Useful hints
Avoid naming specific species. Instead name traits that you would like your creature to have, like wings, horns etc. Or use "chimera", "monster" etc. See sample prompts.

All the raining images have white background, so you're likely to get that, unless otherwise specified. Also, if your creatures are not derpy enough, turn it up. Works best between 1.0 and 2.0.