The bones for this 'not a giraffe' are simply placed and not at all designed for precision.
I added new child bones on the fly as new parts of the model were added.
A functional rig which makes me want to investigate more that gap between such simple functioning rigs and what might replace it later as a more fully articulated rig if the simple model were upgraded to a highly detailed one.
The jaw bone in particular was an attempt to just get a little bit of movement to those areas to hint that there was an actual mouth there.
There is something I really like about this doodling approach to designing a character in that while working through it I start to see those things that would need to be updated and replaced. If diving into the more detailed and final model a lot of time encountering errors would make that a frustrating experience. As opposed to this approach which to me feels more like drawing and sketching ideas. Not as fast as drawing but with the benefit of actually having a working model as opposed to ideas on paper that still need to be implemented.