Okay, here are some screens of (very preliminary) work on the bestiary so far:
Bestiary Images
I should note that although a fair amount of content related to limbs, body structures, and whatnot are already finished in the world generation process, I haven't gotten around to including all of it in the Atlas yet. Most of what I'm doing at this point is adding things line-by-line to tweak the way that descriptions end up reading to the user (there are still a lot of grammatical oopsies to weed out). I left some of these in the first couple of pictures just to display the sorts of things I'm in the process of sifting through (i.e., repetitious or redundant phrases/words like 'this animal is a blah blah animal').
The bestiary is going to end up displaying a wide variety of information about individual creatures, including detailed statistics and species characteristics, ranges of habitation, legends and references to each creature type within other sections of the Atlas, and so forth. For now I'm just focusing on hammering out the basics so that more can be added as I go. Luckily, with redesigned menus, that will be (blessedly) about a thousand times easier to manage.
Creatures are automatically given a representative ASCII character and color according to their name and which other colors have already been selected for other creatures. Eventually colors will correspond with individual creature traits (i.e. a brown-furred creature should end up with a brown character shade as long as there aren't already too many other creatures that are shades of brown, in which case an alternative will be selected based on other traits). For now colors are just randomly selected because I wanted to make sure the display code was working.
Creatures above a certain size category are given upper-case characters to give users an immediate reference on their size. I figured that players would probably want to have an immediate way to know 'oh crap, that thing's huge, maybe I'd better just leave it alone...'.