If optimists see the world through rose-colored lenses, some birds see it through ultraviolet ones. Avians have evolved ultraviolet vision quite a few times in history, a new study finds. Subscribe to ...
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"Contributions have been based around presentations at the Second European Conference of Avian Colour Vision and Coloration, in Paris"--P. S2. "Supplement to The American naturalist, volume 169, ...
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