Deinocheirus! As might be inferred from the title of this post, this is what's in my image-editing application at the moment (among other things, but for sciart, am I going to share those? Obviously not).

This is an intermediate state wherein I block out the areas to be converted to vector. The colors are to keep me from being confused when I zoom in; I don't want gaps in some areas, nor much overlap in others. Proper colors will be applied after it's vectorized in Illustrator.