Ok I'll bite,
How did he prove that the animal is a yellowbelly?
it has a normal belly, no flames to speak of, the head pattern looks wrong and the colour doesn't look right - though that could be the camera as you stated.
Did he show you a picture of another snake and say that is his sister? Or show you a picture of an ivory and say that was his mother?
Enquiering minds wanna know.
dr del