What specific pupil shape is characteristic of the Asian Ahaetulla genus of vine snakes?

Answer

Keyhole-shaped

Ahaetulla species possess a unique horizontal, keyhole-shaped pupil structure. This specific eye shape is highly efficient at regulating light levels, which is a critical evolutionary adaptation for hunting in the complex, dappled lighting environment of dense Asian tropical forests where these snakes reside.

What specific pupil shape is characteristic of the Asian Ahaetulla genus of vine snakes?
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