That is weird the way he faded. I've only seen the opposite happen - snakes gaining color/intensity. Most normal concinnus' don't change at all and I've seen baby hypoerythristic one's where I find the adults and so I think those start out hypo right from the start. Never considered that they could start out looking normal. Very interesting.

It is well known that red radixes don't start out that way so that's no surprise.