// Workers AI · dad joke modeWhat did the flight call say to the phone? "You're cleared for hang-up".
Flight calls are vocalisations made by birds in flight, often serving to keep flocks together.[1]
References
[edit]- ↑ Cech, Rick; Dunning, John B. Jr.; Elphick, Chris (2001). "Behavior". In Elphick, Chris; Dunning, John B. Jr.; Sibley, David Allen (eds.). The Sibley Guide to Bird Life and Behavior. New York: Alfred A. Knopf. pp. 68–69. ISBN 978-1-4000-4386-6.
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