@Arizona Docent as mentioned above, it isn't. Mang mountain vipers are extremely bulky, especially when compared to vipers such as this. @d1am0ndback another snake on exhibit at Dallas I had never heard of otherwise...
@jayjds2 I had never heard of this species either. The sign said "At serious risk" and the range looked VERY limited so I can only assume this is a very rare species to see (Also because Iv'e definitely never seen one before.)
