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What Birds See in Ultraviolet

What Birds See in Ultraviolet

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Birds see colors we can't. With an extra kind of color cone, many birds see ultraviolet light, which reveals hidden patterns on feathers, fruit and eggs. Here's what that world looks like and why it matters to birds. Inside this episode: - A Fourth Kind of Color Cone - Hidden Patterns on Feathers - Fruit, Flowers and Eggs - What We Still Don't Know Sources include the references linked below. Sources and further reading: - [Stoddard et al. 2020, Wild hummingbirds discriminate nonspectral colors, PNAS](https://pmc.ncbi.nlm.nih.gov/articles/PMC7334476/) - [Ödeen & Håstad 2013, The phylogenetic distribution of ultraviolet sensitivity in birds, BMC Evolutionary Biology](https://pmc.ncbi.nlm.nih.gov/articles/PMC3637589/) - [Eaton 2005, Human vision fails to distinguish widespread sexual dichromatism among birds, PNAS](https://pmc.ncbi.nlm.nih.gov/articles/PMC1182419/) - [Middleton et al. 2024, The structural blue of fruit bloom, Science Advances](https://pmc.ncbi.nlm.nih.gov/articles/PMC10849586/) - [Lind et al. 2013, Ultraviolet vision in birds: the importance of transparent eye media](https://doi.org/10.1242/jeb.082834) This episode is a researched science explainer. Evidence and interpretations can change as new discoveries are made; material uncertainty is stated in context. Follow Birds Beyond the Birdsong for more episodes.
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