This black morph (referred to as dark morph by Wheeler) shows a blackish head, upperparts, and underparts including undertail coverts that are field marks for this color morph. [notice the bird is going over a power line in two photos and under a power line in next photo--the bird was going through a multiple lines] This bird also has a white iris that is found on adult birds of this species. Determining gender is a little more difficult. In Raptors of Western North America Wheeler notes that male dark morph's have 'uniformly black' remiges on the underside of the wings. He notes that females may also have 'uniformly black' undersides of remiges but may also "...one or more primaries have large, irregular white spotting." (p. 79) Though on a couple of these photos there are possible whitish areas on the undersides of it's remiges, but these could just be just photo irregularities (due to lighting, missing feathers, etc). Wheeler i...