Have you ever stopped to consider that the pattern abberancies and the death might be interlinked? I've witnessed a few very abberant dead in egg babies like what you refer to. Perhaps the change (whether genetic or environmental) that caused the abberancy also reduced the viability of the embryo.
Also, have you determined if the ringed color pattern in the cobras is simply not a developmental stage that is normal for that species. Many animals have changing patterns as they mature. It's not so difficult to believe that might be the case for your cobra. On the other hand, while color can certainly change as a ball python matures, how many people have seen the pattern shift? ID photos would be useless. I find it incredibly hard to believe that ball pythons, in the 15-20 days prior to hatching have an ability to change their patterns that then completely ceases to exist once they emerge from the egg.
The only way you can say for sure that a particular oddly patterned ball python would hatch with a normal pattern would be to slit the egg and watch them develop. Show me pictures. I have done this with four different species and never saw this happen. If it had a stripe when it was grey and colorless, it had a stripe when it was brown and tan. Granted, I've only done this a couple dozen times, so if there is proof out there of the magical changing pattern snakes, please let it come forth.
>>At least somebody knows. I have a friend that produces Black-necked spitting cobras every year, and one year he had a messed up babie, (died in egg or shortly after hatching) now they normaly hatch out a solid slate grey color with a black head, and orange throat, but this screwed up baby was banded, with white bands throughout its whole body. Very cool looking, but nothing but a srewed up snake.
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>>For the post above.........YES THEY ARE USUALLY NOT PATTERNED NORMALLY UNTIL CLOSE TO HATCHING TIME. It all depends on how close they were before they stopped developing. Ask any large-scale breeder, and they will tell you guys the same thing, cuz it has happened to them on countless occasions also.
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>>Chad Bachman