Aside from humans, there are only a handful of animals capable of passing a mirror test. The mirror, or dot, test measures an animal's ability to self-recognize by applying a removable dye to the animal, then examining whether or not he'll attempt to touch the dye on his own body when seeing it in a mirror.
Check out these intelligent creatures who've attained a level of self-awareness nearly unrivaled in the animal kingdom!
Chimps have no problem recognizing themselves in a mirror. Studies have shown they're bright enough to distinguish a dye dot and remove it by looking at their own reflections. If this video is any indication, they might have a little vanity problem, too.