Red-shouldered Hawk (Buteo lineatus) [XC451479]
by Thomas G. Graves from Orlando Wetlands, Christmas, Orange County, Florida, United States (call)
Red-shouldered Hawk (Buteo lineatus) [XC433675]
by Subramanian Sankar from Oak Park Cemetery, Claremont, Los Angeles County, California, United States (alarm call)
Subspecies
Sometimes placed in Asturina. Apparently close to Ridgway's Hawk (Buteo ridgwayi), Roadside Hawk (Rupornis magnirostris) and, to a lesser extent, Grey-lined Hawk (Buteo nitidus).
The following 5 subspecies are recognised:
elegans Cassin, 1855 - Southern Oregon (north-western USA) to northern Baja California (Mexico).
lineatus (Gmelin, 1788) - Eastern North America, from southern Canada to central USA.