edit: This is a Northern Harrier, either a female, or a juvenile, as explained by the kind people below! I was mistaken in thinking it was a Red-Shouldered Hawk.
I took lots of bird photos today at Nisqually National Wildlife Refuge. I captured this hawk flying above the estuary. I think it looks like a Red-Shouldered hawk, but I’m not sure. Red-Shouldered Hawks are rare in Washington State. It looks like their range is mostly in Oregon and southward. I am new to identifying raptors, so would love any expert opinions!