Non-Migrant: No. All populations of this species make significant seasonal migrations.
Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).
Locally Migrant: Yes. At least some populations of this species make annual migrations of over 200 km.
Thompson (1991a and 1991b) notes that the western population begins fall migration two months earlier than the eastern population, and that western birds undergo a molt while stopping in desert areas of the southeastern Arizona and northwestern Mexico (rather than molting while still on the breeding grounds as eastern birds do). Loss of riparian habitat in this area may be a "bottleneck affecting population numbers" (Lowther et al. 1999). Arrives in Costa Rica in late October, departs by late March (Stiles and Skutch 1989).