diagnostics
36-48 cm, 490-690 g. A large, powerful falcon, which is distinguished by its rufous crown and nape and small black cap that extends past the eyes to form narrow malar stripes. Sexes alike in plumage colouration, but females larger. Upperparts brownish to slate grey. Underparts creamy beige with limited fine streaking and light spotting. Bill grey with dark tip and yellow cere. Legs and feet yellow; claws black. Juvenile differs in having a pale brown crown and nape and heavy streaking on the underparts, and a blue-grey cere and orbital ring (Jenkins 2005a).

