Peterson Field Guide description of a Immature Broad Winged Hawk. “Heavily streaked along sides of neck, breast, and belly: chest often unmarked. Tail has several narrow dark bands: terminal dark band twice as wide as the rest. Rare dark morph, which breeds in Prairie Province, has dark wing lining but shows usual Broad-winged tail pattern.”
You did not indicate where you live in the country which is used to identify birds. I do not believe it is a red tailed hawk. I have seen many and bird watch as a hobby.
Voice: High-pitched, shrill, two-part downward pwe-eeeeee. Nest in trees usually 24-40 feet up. Small poorly built out of sticks, dead leaves. Usually a re-build squirrel, hawk or crow nest.
Range N. Dakota (Turtle Mts.) Nebraska (Missouri R.) Kansas (rare) Oklahoma and east Texas Minnesota and south to Louisiana. Thorough East US rarely in Florida.
www.allaboutbirds.org/guide/Broad-winged_Hawk/id
Denver Colorado area, east side of denver (plains side)