Keywords: PZSL1889Page079.png Polyboroides typicus sic Polyboroides typus <small>A Smith 1829</small> en African Harrier-hawk muscles and tendons dotted of right upper arm from lateral <br/> Anc anconeus muscle t p br tensor patagii brevis t p l tensor patagii longus D deltoid muscle Proceedings of the Zoological Society of London http //archive org/details/proceedingsofgen89zool vol 1889 issue 1 http //archive org/stream/proceedingsofgen89zool page/79/mode/1up page 79 1889 F E Beddard PD-old PZSL 1889-1 Polyboroides typus Accipitridae anatomy Bird wing muscles Deltoid muscle |