What is the primary difference in coloration between juvenile and adult Western Rat Snakes?

Answer

Juveniles display dark blotches on a light background, while adults often fuse markings into a solid dark color.

The transformation of color and pattern during maturation is one of the most dramatic physical shifts observed in this species. Young hatchlings and juveniles exhibit a highly contrasted appearance, featuring dark, prominent blotches superimposed over a lighter background color, which can range from light gray or yellowish-tan to olive hues. As the snake grows into adulthood, this pattern undergoes a profound change; the background color darkens significantly, and the blotches typically merge or fuse together, leading many older individuals, especially in eastern ranges, to appear nearly uniformly jet black. This shift is an adaptation to changing microhabitats associated with increased size.

What is the primary difference in coloration between juvenile and adult Western Rat Snakes?
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