What is the primary function of the specialized loreal pits on the *Crotalus atrox* head structure?
Answer
Heat-sensing mechanism for locating prey temperature
The loreal pits are deep indentations situated on the upper jaw, positioned between the eye and the nostril, which define the snake as a member of the pit viper subfamily Crotalinae. These organs function as sophisticated heat sensors. They allow the snake to detect extremely minute differences in ambient temperature, often fractions of a degree apart. This capability is crucial for nocturnal hunting, enabling the snake to precisely locate warm-blooded prey even when visibility is completely absent in the dark.

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