title: Biological optics: seeing colours in the dark.
abstract: The intensity threshold of colour vision has been behaviourally tested in birds; the results show that parrots lose colour vision in brighter light than humans.
authors.affiliation: Centre for Ornithology, School of Biosciences, University of Birmingham, Edgbaston B15 2TT, UK. p.cassey@bham.ac.uk
authors.forename: Phillip
authors.initials: P
authors.lastname: Cassey
mesh_terms: D000222:Adaptation, Physiological; D000818:Animals; D001522:Behavior, Animal; D055253:Color Vision / Q000502:physiology*; D003623:Dark Adaptation; D003624:Darkness; D010311:Parrots / Q000502:physiology*; D010775:Photic Stimulation; D012160:Retina / Q000502:physiology; D012684:Sensory Thresholds