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Thanks to Andrew Blechman, author of "PIGEONS: The Fascinating Saga of the World’s Most Revered and Reviled Bird": http://www.andrewblechman.com/pigeons...

2001 study showing very low pathogen prevalence on squab farms: https://pubmed.ncbi.nlm.nih.gov/11214...

My old video about the near-extinction of American bison:    • The argument for eating bison (buffal...  

Map of passenger pigeon range by Valérie Chansigaud, via Wikipedia: https://en.wikipedia.org/wiki/Passeng...

Map of rock dove range by Viktor Kravtchenko, via Wikipedia: https://en.wikipedia.org/wiki/Rock_do...