DGN with snake's rattles it's probably, supporters of evolution would argue, due to a mutation of a gene that caused rattlesnakes to develop a growth or outcropping that prevented each old skin from shedding properly. This would be a mutation that conferred a selective advantage as even other predators are cautious and do take note of warnings given. You're a shill. You make a post or two each day with the same basic point, "Hey, look world! See this complicated phenotype? It couldn't possibly have evolved because I have a static world view."