Species fact sheet by Global Register of Migratory Species - www.groms.de

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Migratory, wintering mainly in Mexico, in the central highlands; small numbers seen regularly in S Texas and along the Gulf coast of USA; rare in S California and also in Baja California, mainly in N. Southward migration, probably beginning Jun-Jul, follows two major flyways on either side of the Great Basin Desert, the western route following the Cascade and Coast Ranges and The Sierra Nevada, while the eastern route is along the Rocky Mts; arriving on wintering grounds Aug/Sept. Northward return migration takes place further to the west, along the Pacific coast; birds begin arriving in Washington late Feb and Mar. Timing of migration depends on flower availability.   (del Hoyo J, Elliott A, Sargatal J (eds), 1999)

• digitised by GROMS, after del Hoyo J A Elliott; J Sargatal (eds) (1999) - www.hbw.com,
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