Why Bird Penises Are So Weird
Thanks to 23andMe for sponsoring this video! https://www.23andme.com/minuteearth Male birds have the largest genital diversity of any class of animals because their sex chromosomes make it...
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This video was sponsored by 23adnMe...and hi, I’m Emily from MinuteEarth. The Argentine lake duck’s spiraling penis extends more than 16 inches. The seagull doesn’t have a penis at all. For two animals with so much else in common, this is a pretty big spectrum – in fact, birds exhibit the biggest range in relative penis size of any class of vertebrates. And there are a couple key reasons why. For one, male birds are uniquely set up to pass helpful sexual traits directly to their sons – traits like showy, mate-attracting tail feathers or genitalia of certain dimensions. Animals generally hand these kinds of traits down through their sex chromosomes – but the sex chromosomes male mammals pass on to their sons is pretty tiny and has relatively few g...
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This video was sponsored by 23adnMe...and hi, I’m Emily from MinuteEarth. The Argentine lake duck’s spiraling penis extends more than 16 inches. The seagull doesn’t have a penis at all. For two animals with so much else in common, this is a pretty big spectrum – in fact, birds exhibit the biggest range in relative penis size of any class of vertebrates. And there are a couple key reasons why. For one, male birds are uniquely set up to pass helpful sexual traits directly to their sons – traits like showy, mate-attracting tail feathers or genitalia of certain dimensions. Animals generally hand these kinds of traits down through their sex chromosomes – but the sex chromosomes male mammals pass on to their sons is pretty tiny and has relatively few g...
