This is a Red-tailed Hawk Buteo jamaicensis that I saw this morning that does not have a red tail at all. The adult Red-tailed Hawks clearly have a red tail. Here is an example.
The field marks that are shared by both the immature and adult Red-tailed Hawks are the dark leading inner wing as seen from below, called the "patagial mark", the bulging inner trailing wing (secondaries), and the dark head with light breast.
This is the same bird shown in the top photo at a different angle.
This is an adult Red-tailed Hawk in a similar aspect.
Red-tailed hawks are in most parts of the U.S. the most common buteo, and can be extremely varied in plumage. Some are dark morphs, with the whole body being dark. Others can be very light, with barely visible belly band.
Hawk ID is a challenge, and Red-tailed Hawks don't make it any easier.
Good birding.
