Versions of this image are all over the web but good sourcing is hard to come by. This German forum seems to suggest that a camera panned over a manuscript page where this was an illustration during a show on the History Channel, but as citations go, I admit that’s pretty lame:

anal toucan

I guess the idea was to suggest that oral sex, if you were so foolish to partake, would be punished by a toucan with a fierce anal fixation?