Seeing danger? Visual constraints and collision risk in the Bearded Vulture Gypaetus barbatus

Bearded vultures, Gypaetus barbatus, show very low peak contrast sensitivity, suggesting contrast-limited object detection as a key constraint for collision mitigation.

• Why it matters: Collision risk with human-made aerial infrastructure remains high, but the species-specific visual mechanisms behind object detection are poorly characterized, limiting targeted mitigation.
• What they did: The study measured visual ecology across visual fields, spatial resolution, contrast sensitivity, and cone spectral sensitivity, including functional characterization of four cone visual pigments.
• The result: The birds have no blind area in the direction of travel during foraging flight and axial length predicts high spatial resolution, while cone sensitivity spans ~350–640 nm (with chromatic discrimination from 400–602 nm), together implying contrast sensitivity is the main perceptual limitation.

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