Trogonophids occur in northern Africa, Socotra Island, and the eastern Arabian peninsula.

head. This behavior explains some of the specialized and unique anatomy of these forms. For example, the noncircu-lar shape of the trunk in cross-section is useful in force resistance during oscillatory movements of the head, preventing the entire body of the animal from spinning. Trogonophids also use their exceptionally short tails as anchors to apply force when burrowing with their heads. Some trogonophids display interesting defensive behaviors when threatened, such as rolling over on their backs and freezing.

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