Eastern Box Turtle. Box Turtles are the only testudines with a hinged plastron so that the head and limbs can not only be withdrawn, but shut tight.
There are many kinds of turtle heads, which may seem obvious because there are certainly many kinds of turtles. And sometimes turtles themselves are not satisfied with having just one head!
Cheer up gals, maybe Sarah Paulson will portray you in a Teenage Mutant Ninja Turtles sequel?
But you don't need to have a shell and scales to be a turtle head. You can have roots, leaves, and flowers:
The pink Turtle head of the genus Chelone. Native to North America.
Or you can have a few guitars instead of shells or blossoms.
The Turtle Heads performing in South Jersey. (LINK)
But I think the most whimsical type of turtle head is the kind I learned about many years ago from a female co-worker who was complaining that she had been too busy to get a bathroom break and was now being plagued with a "turtle head". I had not heard that particular bit of slang before and she explained that just like a turtle who can't quite decide to keep its head in or out, the same things can happen when faced with insistent poop at an inopportune time!
The turtle version.....
.......and the poopie peek-a-boo version.
I suppose the notion of the poop turtle head is amusing enough to people to take it to a celebratory level. What could be more amusing, though less appetizing, than a turtle head cake?
Admittedly gross, yet hysterical.
So, as you can see, there are all sorts of turtle heads. And sometimes you can even combine a couple to get a sort of turtle head hybrid:
A turtle head that is simultaneously reptilian and fecal!