Also there may be some superficial resemblance to Sooty Falcon and Grey Kestrel, but those two species both have yellow feet and cere.
The eggs are usually laid in the nest of a Hamerkop; most often an unoccupied nest but occasionally Hamerkops will be forced out.
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The most similar species is the Sooty Falcon which has a more rounded head, long wings extending past the tail and less yellow around the eye.
Grey's Anatomy | Grey Cup | Zane Grey | Grey Heron | Lady Jane Grey | George Grey | Earl Grey | Rolls-Royce Kestrel | Grey | The Grey Fox | Kestrel | Jean Grey | Rudolph Grey | Edward Grey, 1st Viscount Grey of Fallodon | Joel Grey | Grey Teal | Charles Grey, 2nd Earl Grey | Al Grey | Albert Grey, 4th Earl Grey | Grey Nuns | Fifty Shades of Grey | David Grey | Alex Grey | Thomas de Grey, 6th Baron Walsingham | The Old Grey Whistle Test | Grey Gardens | Common Kestrel | Charles Grey | Aubrey de Grey | Thomas de Grey, 2nd Earl de Grey |