GeoTerraTestudo said:Are ivory sulcatas called "ivory" because they are pale, or because they hale from the Ivory Coast, Africa? If it is because they are pale, does that decrease their tolerance for solar radiation, and increase their ability to synthesize vitamin D, as in humans?
It is a phenotypic descriptor.
They do not appear to suffer any ill effects, although the basic physics apply regarding heat gain and retention due to chromatic difference. A dark sulcata of a given size at a particular starting temperature will heat up faster than its pale equivalent in the same set of conditions. Does this become significant? I do not know and, since there is no need for me to modify care, I do not worry about it. Due to the leucism, their eyes are fine in the sunlight, too. No special care needed in that regard.