A prehistoric non-bird, found via Scientific Illustration.
(Not to be mistaken for the rather unpleasant crusts on the mouths of fever sufferers.)
If there’s something familiar about this composition, it might be because John Sibbick also illustrated Warhammer roleplaying game books, White Dwarf magazine covers and death metal record covers. But they don’t seem to have as much character as this little guy, hanging out on a palm frond, wondering if it’d be a good time to glide off somewhere else or if it’d be wiser to wait a little bit longer.