White-throated Swift (Aeronautes saxatalis) [XC467746]
by Paul Marvin from Pallisades Road, Douglas County, Washington, United States (flight call, song)
White-throated Swift (Aeronautes saxatalis) [XC362533]
by Patrick Turgeon from Colorado National Monument, Mesa County, Colorado, United States (flight 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.