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Tetrachromacy, oil droplets and bird plumage colours
Abstract There is a growing body of data on avian eyes, including measurements of visual pigment and oil droplet spectral absorption, and of receptor densities and their distributions across theExpand
Visual pigments, oil droplets, ocular media and cone photoreceptor distribution in two species of passerine bird: the blue tit (Parus caeruleus L.) and the blackbird (Turdus merula L.)
Abstract The spectral absorption characteristics of the retinal photoreceptors of the blue tit (Parus caeruleus) and blackbird (Turdus merula) were investigated using microspectrophotometry. TheExpand
Plumage Reflectance and the Objective Assessment of Avian Sexual Dichromatism
Assessment of color using human vision (or standards based thereon) is central to tests of many evolutionary hypotheses. Yet fundamental differences in color vision between humans and other animalsExpand
Ultraviolet Vision in Birds
Publisher Summary Birds can see ultraviolet (UV) light because, unlike humans, their lenses and other ocular media transmit UV, and they possess a class of photoreceptor, which is maximally sensitiveExpand
Blue tits are ultraviolet tits
The blue tit (Parus caeruleus) has been classified as sexually monochromatic. This classification is based on human colour perception yet, unlike humans, most birds have four spectrally distinctExpand
Ultraviolet vision and mate choice in zebra finches
SEXUAL selection is one of the most actively studied areas of evolutionary biology1–3, and ever since Darwin1 birds have been probably the most popular taxon for testing the predictions about colourExpand
Ultraviolet plumage colors predict mate preferences in starlings.
Avian plumage has long been used to test theories of sexual selection, with humans assessing the colors. However, many birds see in the ultraviolet (<400 nm), to which humans are blind. Consequently,Expand
Sexual Selection and the Mismeasure of Color
Many long-standing evolutionary hypotheses make predictions about trends in color patterns. Examples of these include crypsis, mimicry and warning coloration, fruit coloration, flower coloration, theExpand
Ultraviolet vision in birds: What is its function?
Although UV vision was first demonstrated in birds in the early 1970s, its function is still unknown,. Here we review the evidence for UV vision in birds, discuss the special properties of UV light,Expand
Is the ultraviolet waveband a special communication channel in avian mate choice?
There is growing evidence that ultraviolet (UV) wavelengths play an important role in avian mate choice. One of the first experiments to support this idea showed that female zebra finchesExpand