I love dinosaurs so much :)
My favorite would have to be the early Microrapter from the cretaceous period. The one with 4 wings that most commonly is seen as a bird, but is in fact a species of raptor.
I could drone on forever about how cool this little critter is, but ill spare you all that boring stuff xD.
- Dino/Wilbur/Toby (he/they/xe)