Rainer -
These "mutants" you refer to are linebred freaks that should be euthanized in my opinion.
One or more may be found on occasion in the wild and that is it. If they (the genes that cause a specific trait like amelanism) were positive changes in the physiology of a particular snake species well then mother nature would "select" that trait for survival and therefore it would not be rare: it would be the NORMAL phenotype. However, it is not and the animals are normally IMMEDIATELY eaten by predators, etc.
People started to treasure the colorful mutant-morphs simply because they were different. Now they are common and make herpers look like beanie-baby collectors. That's it.
We disagree on this Rainer.
Who says they don't survive in the wild? There is no data supporting this. Can you prove that they don't survive? Or is it just heresay.
Here is some proof that amelanitic snakes DO survive in the wild and are able to avoid predators. There are many other examples but this one was just found last week. So I thought I would post it. It is estimated that this Glossy is 3 years old. Glossys in general grow a lot slower than other snakes. Even in captivity they are documented slow growers. A captive specimen that was raised from hatchling caught in the fall took 3 years to reach 18 inches and had barely reached 24 in its 5th year.

"These "mutants" you refer to are linebred freaks that should be euthanized in my opinion."
These kind of staments made on a forum FOR breeding, gets my troll of the week award.
Congrats!

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"Yeah ya told me, and ya wrote it down too. But how the hell am I supposed to remember!"