I solicited a second opinion from raptor expert Dick Forsman on yesterday's Booted Eagle images and he responded by stating
''Hi Lee, No doubt, it is a moulting Black Kite. Not that easy to pinpoint any specific characters in these images, it is just a spot on BK jizz-wise. However, important things worth noting, are the overall dark remiges with a pale carpal crescent by the leading edge, a normal BK feature, as well as the moulting, half-grown outer tail feathers, which show the pointed tip of BK. Even in this light a dark Booted would have shown clearly paler inner primaries and the silhouette of Booted shows shorter wings and longer tail compared to this bird, Dick''