There was a similar outcome in North America as birds failed to establish after being released in Long Island, New York in 1852, Oregon in 1889–1892, and the Saanich Peninsula in British Columbia in 1908–1910.
Houbo intentos semellantes en América do Norte mais ningún deles conseguiu o seu obxectivo despois de liberacións en Long Island, Nova York en 1852, Oregón en 1889–1892, e a península de Saanich na Columbia Británica en 1908–1910.