Keywords: PZSL1889Page080.png Serpentarius serpentarius Sagittarius serpentarius <small> J F Miller 1779 </small> en Secretarybird muscles and tendons dotted of right upper arm from lateral <br/> Anc anconeus muscle Bi biceps muscle Bi' accessory biceps 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/80/mode/1up page 80 1889 F E Beddard PD-old PZSL 1889-1 Sagittarius serpentarius illustrations Bird wing muscles Deltoid muscle Accipitriformes anatomy |