I recently got a pair of Mussuranas (Boiruna maculata) from John Michels at Black Pearl Reptiles. They are from a Uruguayan, David Fabius, stock. They are unbelievably hard to photograph because of how deep their blacks are and the iridescent, oil-slick sheen to them. Anyways, the male is normal and the female is a piebald (which works as a co-dominant trait with the super an almost all-white pied). Here they are - I went a little snapshot crazy ;D:
Male:
Female (you can still see some of the red band on her neck):
Not the best, but some belly shots showing the pied effect:
Just thought this was a neat shot, showing tongue movement