Cannabaceae October 12, 2016October 12, 2016 thcscience_admin Bird vocalisation Flight call of the European herring gull (Larus argentatus) 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.