Number observed: 1
Details: Seen at close range sailing over tree-tops by highway. Considered to be unmistakable - both observers with many years of experience seeing this familiar species. Bird was drifting in roughly southerly direction. Huge, blackish and raptor-like, probably of comparable size to Golden Eagle. Long, broad wings with many-fingered 'hands' held in upward 'V', and somewhat 'swept-back'. Blackish underwing-coverts contrasting with lighter, silvery underside to flight-feathers (i.e. primaries and secondaries). Sailing flight action with occasional 'rocking' motion. Longish/narrowish all-dark tail. Distinctly small/narrow reddish head.