Besides the postocular stripe, what specific stripe configuration is sometimes noted on the side of the *Crotalus atrox* head?
Answer
One dark stripe and two light stripes
The facial markings are key features used to identify the species. Generally, the snake exhibits two dark stripes running diagonally downward from each eye towards the jawline. More specifically, there is a postocular stripe, typically gray or umber, descending from the lower eye edge. However, documentation suggests variation or alternative interpretations exist, as some sources specifically note a pattern consisting of one distinct dark stripe accompanied by two separate light stripes located on the side of the head, running below the eye area.
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