http://www.boa-constrictors.com/en/b...ongicauda_zero

It took me a few minutes to find the page with more information than just a picture. The link above contains some additional info. I have NEVER seen the zeros here in the states. I hope to in the future! I would say that they are quite rare at this point and may not be available yet to the general public. I have only seen anerythristic and hypermelanistic in the pure BCL lines. If you do find any zeros available, do let us know.