Episodi

  • Why Flamingos Are Pink

    Why Flamingos Are Pink
    Oct 8 2026
    Flamingo chicks hatch grey, not pink. Here's how they get their famous color from what they eat, how pigments travel from tiny algae and shrimp into their feathers, and what a flamingo's shade of pink can signal to other flamingos. Inside this episode: - Born Grey - Pink From the Menu - From Algae to Feathers - What the Color Signals Sources include the references linked below. Sources and further reading: - [Smithsonian's National Zoo, Why are flamingos pink?](https://nationalzoo.si.edu/animals/news/why-are-flamingos-pink-and-other-flamingo-facts) - [San Diego Zoo Wildlife Alliance, Flamingo](https://animals.sandiegozoo.org/animals/flamingo) - [Chiale et al. 2021, Sun exposure and flamingo plumage color, Ecology and Evolution](https://pmc.ncbi.nlm.nih.gov/articles/PMC8525176/) - [ScienceDaily, Flamingos use makeup to attract mates](https://sciencedaily.com/releases/2010/10/101025101634.htm) - [Fiorucci et al. 2020, Crop milk in flamingos, Animals](https://pmc.ncbi.nlm.nih.gov/articles/PMC7460415/) 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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    9 min
  • What Birds See in Ultraviolet

    What Birds See in Ultraviolet
    Oct 8 2026
    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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    9 min
  • How Small Birds Survive a Winter Night

    How Small Birds Survive a Winter Night
    Oct 8 2026
    On a freezing winter night, a bird that weighs less than an ounce has to make it to morning. Here's how small birds do it, from fluffed feathers and shivering to huddling together and letting their bodies cool down on purpose. Inside this episode: - Fluffing Up - Shivering for Heat - Roosting Together - Cooling Down on Purpose - Fuel for the Night Sources include the references linked below. Sources and further reading: - [University of Alaska Fairbanks, Finding a midwinter night's roost](https://uaf.edu/news/archives/news-archives-2010-2021/finding-a-midwinter-nights-roost.php) - [Heinrich, How do birds survive the winter? Cornell Lab, All About Birds](https://www.allaboutbirds.org/news/how-do-birds-survive-the-winter/) - [Brodin, Nilsson & Nord 2017, Adaptive temperature regulation in the little bird in winter, Oecologia](https://pmc.ncbi.nlm.nih.gov/articles/PMC5596050/) - [Cooper 1999, The thermal and energetic significance of cavity roosting, The Condor](https://academic.oup.com/condor/article/101/4/863-866/5124258) - [Hatchwell et al. 2009, Huddling in long-tailed tits, Functional Ecology](https://eprints.lancs.ac.uk/id/eprint/63241/) 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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    8 min
  • How Hummingbirds Hover

    How Hummingbirds Hover
    Oct 8 2026
    Hummingbirds are the only birds that can hover again and again, all day long. Here's how they do it: wings that are mostly hand, strokes that lift on the way back, oversized muscles, a sugar-powered engine, and eyes that keep them locked in place. Inside this episode: - A Wing That's Mostly Hand - Lift on the Way Back - The Engine - Running on Sugar - Holding Still in a Moving World Sources include the references linked below. Sources and further reading: - [Warrick, Tobalske & Powers 2005, Aerodynamics of the hovering hummingbird, Nature](https://www.nature.com/articles/nature03647) - [Ingersoll, Haizmann & Lentink 2018, Biomechanics of hover performance in Neotropical hummingbirds versus bats, Science Advances](https://pmc.ncbi.nlm.nih.gov/articles/PMC6157961) - [Altshuler & Welch 2025, Extraordinary creatures: hummingbirds, Journal of Experimental Biology](https://journals.biologists.com/jeb/article/228/11/jeb250963/368243/Extraordinary-creatures-hummingbirds) - [Goller & Altshuler 2014, Hummingbirds control hovering flight by stabilizing visual motion, PNAS](https://pmc.ncbi.nlm.nih.gov/articles/PMC4280641) - [Welch & Suarez 2007, Oxidation rate and turnover of ingested sugar in hovering hummingbirds, Journal of Experimental Biology](https://journals.biologists.com/jeb/article/210/12/2154/16868/Oxidation-rate-and-turnover-of-ingested-sugar-in) - [U.S. Fish & Wildlife Service, Hummingbirds of North America](https://www.fws.gov/story/hummingbirds-north-america) 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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    8 min
  • How Birds Build Nests That Hold Together

    How Birds Build Nests That Hold Together
    Sep 21 2026
    A bird's nest can be woven, stacked, molded or stitched from surprisingly ordinary materials. Explore the movements, material choices and structural tradeoffs that help nests hold together. Inside this episode: - There is no single bird nest - The foundation - Friction and entanglement - Weaving, knotting, and tucking - Mud, silk, and other binders Sources include Current Biology, Nests and nest building in birds, Avian Biology Research, design and function of birds' nests, and Construction patterns of birds' nests. This episode is a researched narrative summary. Historical records may be incomplete, translated differently, or interpreted differently by scholars. We distinguish documented facts, estimates, disputed interpretations, and later stories where material. Corrections are logged and incorporated into future editions. Follow Birds Beyond the Birdsong for more researched stories about the science and behavior of birds.
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    13 min
  • Why Starlings Form Murmurations

    Why Starlings Form Murmurations
    Sep 21 2026
    See how thousands of starlings produce a coordinated murmuration without a single bird directing the flock. Local responses, visual cues and predator pressure help explain the moving patterns overhead. Inside this episode: - Before the roost - The predator in the sky - No leader at the front - Who counts as a neighbor - The dark waves Sources include PLOS One, citizen science and starling murmurations, Behavioral Ecology and Sociobiology, collective escape, and Empirical study of naturally occurring starling flocks. This episode is a researched narrative summary. Historical records may be incomplete, translated differently, or interpreted differently by scholars. We distinguish documented facts, estimates, disputed interpretations, and later stories where material. Corrections are logged and incorporated into future editions. Follow Birds Beyond the Birdsong for more researched stories about the science and behavior of birds.
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    11 min
  • How Owls Locate Prey in Darkness

    How Owls Locate Prey in Darkness
    Sep 21 2026
    Follow the hearing experiments that reveal how some owls locate hidden prey with remarkable precision. Ear placement, facial feathers and split-second timing all contribute to the hunt. Inside this episode: - A target made of sound - Left, right, early, late - Finding height - The facial disc - Why the head moves Sources include Journal of Experimental Biology, Acoustic Location of Prey by Barn Owls, How the Owl Tracks Its Prey, review, and U.S. Department of the Interior, owl adaptations. This episode is a researched narrative summary. Historical records may be incomplete, translated differently, or interpreted differently by scholars. We distinguish documented facts, estimates, disputed interpretations, and later stories where material. Corrections are logged and incorporated into future editions. Follow Birds Beyond the Birdsong for more researched stories about the science and behavior of birds.
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    11 min
  • How Migrating Birds Navigate at Night

    How Migrating Birds Navigate at Night
    Sep 20 2026
    This episode explores the evidence for celestial, magnetic, visual and learned navigation cues, with uncertainty stated naturally. The story keeps the mechanisms clear and the research grounded for a casual listener. Inside this episode: - Direction and destination - Reading the stars - Earth's magnetic field - Sunset, polarized light, and calibration - Landmarks, smells, and experience Sources include Nature review, long-distance navigation and magnetoreception, The Magnetic Compass of Birds review, and Nature, magnetic sensitivity of cryptochrome 4. This episode is a researched narrative summary. Historical records may be incomplete, translated differently, or interpreted differently by scholars. We distinguish documented facts, estimates, disputed interpretations, and later stories where material. Corrections are logged and incorporated into future editions. Follow Birds Beyond the Birdsong for more researched stories about the science and behavior of birds.
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    10 min