Bob, Python Curtus or Sumatran black short tails do change/ darken with age. Spcimens with the cream,tan, beige heads are not LIKELY to turn black..They will be dark, but likely dark browns..Some call these chrome heads which is really INCORRECT, Chrome heads are silver / gray and CAN change to black at times..The blackest / darkest of specimens will start with a black / dark / chrome head..The darkest baby will likely be the darkest adult..
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