What physical defense mechanism lends the Ball or Royal Python (*Python regius*) its common name?

Answer

Curling into a tight ball, tucking the head centrally for protection.

The Ball Python, or Royal Python, derives its common name directly from its primary physical defense strategy when it perceives a threat. Rather than attempting to flee or bite defensively at an unfamiliar presence, this relatively small and stocky python will physically recoil its body, coiling itself into an extremely tight sphere or ball. During this defensive posture, the snake carefully tucks its vulnerable head securely in the center of the coil. This behavior effectively shields the most sensitive part of its body and presents a dense, unyielding mass to potential predators, which is highly effective given its modest size compared to other python species.

What physical defense mechanism lends the Ball or Royal Python (*Python regius*) its common name?
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