Falcon visual acuity.

R Fox; S W Lehmkuhle; D H Westendorf

doi:10.1126/science.1257767

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PubMed · 1257767

Falcon visual acuity.

R Fox·S W Lehmkuhle·D H Westendorf

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Abstract

Grating acuity, the ability to resolve high-contrast square-wave gratings, was measured in a falcon and in humans under comparable conditions. This behavioral test of falcon acuity supports the common belief that Falconiformès have superb vision-the faclon's threshold was 160 cycles per degree, while the human thresholds were 60 cycles per degree. Falcon acuity, however, was much more dependent on lumanance, declining sharply with decreases in luminance.

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Animals Birds Fovea Centralis Light Visual Acuity Comparative Study Journal Article Research Support, U.S. Gov't, P.H.S.

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R Fox, S W Lehmkuhle, D H Westendorf. 1976-04-16. Falcon visual acuity.. https://doi.org/10.1126/science.1257767

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