Which bird has eyes fixed in its skull and must turn its head to see?

The story behind the answer

Owl. Unlike most birds, an owl’s large, tube-shaped eyes are held rigid by bony “sclerotic rings,” so it can’t roll its eyes—it must turn its whole head to look around. To compensate, owls have 14 neck vertebrae (humans have 7), allowing them to rotate their heads up to about 270 degrees without cutting off blood flow, thanks to specialized blood vessel adaptations.

This design supports superb night hunting: forward-facing, immobile eyes give wide binocular vision and excellent depth perception, while their facial disk and asymmetrical ears sharpen hearing. Memory tip: think “owl stare”—the eyes don’t move, so the head must swivel.