What distinct head marking aids in identifying *C. molossus*?

A distinct dark band that runs across the top of the head and through the eye

While the tail color is primary, identification can be aided by specific facial features, particularly when the tail pattern might be obscured or confusing in juveniles. The black-tailed rattlesnake frequently exhibits a strong, conspicuous dark stripe or band. This stripe originates on the top of the head and characteristically passes directly through the eye area, often referred to as an ocular stripe. This pattern serves as an important secondary field marker, distinguishing it from other snakes that might share similar body colors or cryptic patterns against scrub brush and rock formations. Knowing to look for this dark ocular marking can expedite correct identification before focusing solely on the less variable tail segment.