White-throated Swift (Aeronautes saxatalis) [XC493281]
by Caleb Helsel from Bill Williams River NWR, Arizona, United States (call)
White-throated Swift (Aeronautes saxatalis) [XC552937]
by Bobby Wilcox from Kwaamii Point, near Mt. Laguna, San Diego County, California, 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.