This is the crease pattern for the fire wyvern shown in my gallery: fav.me/d6h5yo0
I'd recommend a sheet of thin, strong sheet of at least a 12" square (I've had good success with unryu). Wet fold the details with MC for posing.
Built on a 32x32 grid.
A note: there may be some sliver creases near those weird non-grid creases the base of the wing that I didn't show here. The CP as shown technically doesn't fulfill the requirements for flat-foldability, but as you collapse it from the wings in, these fudge factor creases tend to work themselves in and the whole thing actually folds quite flat.