For birds, flight is their whole schtick. To come across a bird that doesn't fly gives us pause. Flight gives a bird so many advantages, why would they ever give it up? Well, if conditions are just right sometimes it can make sense. Join me today to discover what forces can compel a bird to give up the sky.

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Notes:

• Penguin Extravaganza!: https://www.buzzsprout.com/1733312/10464354-penguin-extravaganza
• Ratites: https://en.wikipedia.org/wiki/Ratite
• Keels: https://en.wikipedia.org/wiki/Keel_(bird_anatomy)
• Ostrich: https://ebird.org/species/ostric2
• Cassowary: https://ebird.org/species/soucas1
• Terror Birds: https://en.wikipedia.org/wiki/Phorusrhacidae
• Demon Ducks: https://en.wikipedia.org/wiki/Dromornithidae
• Kiwi: https://ebird.org/species/nibkiw1
• Kakapo: https://ebird.org/species/kakapo2
• Takahe: https://ebird.org/species/takahe3/
• Inaccessible Island Rail: https://en.wikipedia.org/wiki/Inaccessible_Island_rail
• Waiting for Godot (bird astride the grave): https://en.wikipedia.org/wiki/Waiting_for_Godot 
• Giant Coot: https://ebird.org/species/giacoo1?siteLanguage=en_AU
• Kagu: https://ebird.org/species/kagu1
• Junin Grebe: https://ebird.org/species/jungre1
• Titicaca Grebe: https://ebird.org/species/titgre1
• Flightless Steamer Duck: https://ebird.org/species/flistd1
• Steamer Duck ... steaming: https://www.youtube.com/watch?v=aKAUA-g6sp8&ab_channel=JohnViveiros
• Lyall's Wren: https://en.wikipedia.org/wiki/Lyall%27s_wren
• A Tale of Two Islands: https://www.buzzsprout.com/1733312/9071817-a-tale-of-two-islands