Do birds have backwards knees? скачать в хорошем качестве

Do birds have backwards knees?

At some point you may have looked at a bird and wondered, "Why are its knees backwards?" It's certainly normal to have this question! Let's get into some avian biology and see if they have funny joints and for what purpose it serves. Chapters: Question and short answer 00:00 Ankle versus knee 00:20 Unguligrade, digitigrade, plantigrade 00:49 Length of the bones 01:42 What's the purpose? 02:54 Conclusion 03:58 All Things Birdie Merchandise https://all-things-birdie.myspreadsho... Social Media: Instagram @allthingsbirdie Photos and video sources: Canva.com https://www.canva.com/policies/free-m... Flickr.com https://www.flickr.com/creativecommons/ Pexels.com https://www.pexels.com/license/ Wikipedia Creative Commons License https://creativecommons.org/licenses/... Credits in order of appearance: Question and short answer -Seagull walking by blueringmedia from Canva.com Ankle versus knee -Person walking by Vadym Loginov from Canva.com -Grey-crowned Crane by thomasfiller from Canva.com -Pigeons by Vadym Loginov from Canva.com -Hawk by slick479 from Canva.com Ungluligrade, digitigrade and plantigrade -Dog by Gabe from Pexels.com -Cat by yuliang11 from Canva.com -Person walking by vexler from Canva.com -Black bears by Jillian Cooper from Canva.com -Pointe shoes by pixelshot from Canva.com -Ballet shoes by cbarnesphotography from Canva.com -Ballet shoes by technotr from Canva.com Length of the bones -Stilt by SimplyArt4794 from Pexels.com -Wattled jacana from hstiver from Canva.com -African jacana by Bernard DuPont from Flickr.com -Bird leg skeleton by DarekK2 -Pelican in flight, photographer unknown from Canva.com -Bones of human foot by Science Photo Library from Canva.com -Dove skeleton by BIODIDAC from Wikipedia.com -Human leg bones by Science Photo Library from Canva.com -Green heron by mlharing from Canva.com -Stone curlew by Cajarima01 from Canva.com -Bush stone curlew by blueringmedia from Canva.com What's the purpose? -Person hiking by IgorUsachev from Canva.com -Person running by RyanKing999 from Canva.com -Person sprinting by herraez from Canva.com -Dove sleeping by Gajus from Canva.com -Stone curlew by Thipwan from Canva.com -Mourning dove resting by Aakarsh Gopisetty from Canva.com -Pigeon resting by Jane Tonal from Canva.com Thumbnail photo credit: Black-necked Stilt by Mary Herron from Canva.com