White-throated Swift (Aeronautes saxatalis) [XC799699]
by Steve Hampton from KOFA Queen Canyon, Yuma, Yuma County, Arizona, United States (call, flight call)
White-throated Swift (Aeronautes saxatalis) [XC554576]
by Scott Olmstead from Carrizo Plain National Monument, Santa Margarita, San Luis Obispo County, California, United States (call)
Subspecies
Closely related to White-tipped Swift (Aeronautes montivagus).
The following 2 subspecies are recognised:
saxatalis Woodhouse, 1853 - South-western Canada south through western USA to southern Mexico (Oaxaca) west of Caribbean lowlands.
nigrior Dickey & van Rossem, 1928 - Southern Mexico (Chiapas) to central Honduras.