Pigeon flicker fusion frequencies (at 75% correct choices) associated with different peak wavelength light-emitting diodes and average flicker fusion frequencies of three human observers. DeliusJuan D. DeliusJulia A. M. LeeJennifer M. 2017 <p>Pigeon flicker fusion frequencies (at 75% correct choices) associated with different peak wavelength light-emitting diodes and average flicker fusion frequencies of three human observers.</p>