My understanding is that the "dirtiness" of the cream bands and even the wideness is very locale dependent.
But anyway - the bright white bands - you can't see the scales, they are overexposed, so the dirtiness can't be determined. In one spot though you can see the scales, and they are dirty - not clean.
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3.0 WC; 0.3 CB L. getula californiae
1.0 CB L. getula nigrita
0.1.1 WC; 0.0.3 CH Elgaria multicarinata multicarinata

