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Lakeland, Florida, is selling some of its 'iconic' swans amid rising costs and safety concerns
The Fascinating, Regal History Behind Britain's Swans | History | Smithsonian Magazine
Tundra swan | U.S. Fish & Wildlife Service
Black Swan Green by David Mitchell - Teacher's Guide: 9780812974010 - PenguinRandomHouse.com: Books
Amazon.com: The Black Swan, Second Edition: The Impact of the Highly Improbable: With a new section: "On Robustness and Fragility": Incerto, Book 2 (Audible Audio Edition): Joe Ochman, Nassim Nicholas Taleb, Random