So, it turns out, if you want to make a full-color book with a ton of pages, it's expensive to produce. So expensive, that if I were to price it in a range that would allow anyone to want to buy it, I would get negative royalties (insert sad trombone sound here).
So, the illustrations have been divided up, and I'm publishing two books! I tried to divide them evenly, so as not to get too many quotations from one source in each book, separated birds and bugs, etc... But now that I've been working with and formatting the two different sets of illustrations, there's definitely one book I like better. I won't tell you which one.