*loves this so much* Every time I find a fandom, I turn around and find it descending into popularity. (I read and adored the first Harry Potter book when it was originally published, and two books later I was lost under a sea of enthusiastic eight-year-olds and Bible-thumping angry parents....) I can't decide if I'm a trendsetter or an albatross.
I was very recently one of the Backyard Trees (or possibly a Hmmmicorn) and then a horde of Fan Pirahnas and Wow Birds swarmed my page... Yes, this describes them perfectly. Fan Pirahnas, lol, I'd never have thought of it!
I quite enjoyed this dA Bestiary of yours. It made me giggle incessantly and your artwork brings to mind fond memories of joke cards and MAD magazine. ^_^