Epidexipteryx

In contrast to most of the massive prehistoric creatures on this list, Epidexipteryx was a tiny prehistoric creature. Presumably the first example of ornamental feathers (think of a peacock), Epidexipteryx grew up to 17.5 inches (44.5 cm) with almost half of that encompassing just the tail feathers. This feathered dinosaur lived during the Middle or Upper Jurassic age throughout Inner Mongolia.