Red-tailed Hawks are quite common but not the ones of this variety. I have seen this particular one hanging out along a back-country road northeast of my home a few times but have never had much luck getting a picture. Recently though, the raptor was kind enough to sit still just long enough for me to snap this capture.
Leucism is a genetic mutation that prevents pigments from being properly embedded in feathers thus resulting in lighter than normal coloring. I’ve seen pictures of other hawks with the condition that were far whiter than this one.