Photo: Gary Vlahakis, March 16, 2014. Bird's eye view of the Red Tailed Hawk in the nest at corner of Allesandro & Rosebud in the Northbound 2 Freeway parkway. (Click on photo to enlarge.)
Vlahakis thinks this is the female. She is enormous. Females are typically larger than the males of the species.
Read a good Q&A about the Cornell University nesting Red Tails.