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Once considered noble and heroic, pigeons are now viewed as an urban nuisance — one that costs cities millions of dollars a year. Zachary Crockett tosses some crumbs.

• SOURCES:
  • Andrew Blechman, journalist and author.
  • David Champagne, owner of Bird Busters, Inc.

• RESOURCES:
  • "Racing Pigeon Sells For A Record-Breaking $1.9 Million At Auction," by Carlie Porterfield (Forbes, 2020).
  • "Feathers of Honor: U.S. Army Signal Corps Pigeon Service in World War I, 1917–1918," by Frank A. Blazich Jr. (Army History, 2020).
  • "Pigeon Wars," by Jon Mooallem (The New York Times, 2006).
  • Pigeons: The Fascinating Saga of the World's Most Revered and Reviled Bird, by Andrew Blechman (2004).
  • "Pigeons Have Magnets," by Charles Walcott, James L. Gould, and J. L. Kirschvink (Science, 1979).
  • "The Pigeon as a Quality-Control Inspector," by Thom Verhave (American Psychologist, 1966).

• EXTRAS:
  • "Freakonomics Radio Live: 'Jesus Could Have Been a Pigeon,'" by Freakonomics Radio (2018).