Ann & Steve Toon / African harrier-hawk (Polyboroides typus) Kgalagadi Transfrontier Park, South Africa.

Eric Baccega / African harrier hawk (Polyboroides typus) flying. Baringo lake. Kenya.

Eric Baccega / African harrier hawk (Polyboroides typus) taking off, Baringo lake. Kenya.

Bernard Castelein / Madagascar Harrier Hawk (Polyboroides radiatus) female in tree, Reniala Forest, Mangily, Madagascar

Bernard Castelein / Madagascar Harrier Hawk (Polyboroides radiatus) male and female mating in tree, Reniala Forest, Mangily, Madagascar

Bernard Castelein / Madagascar Harrier Hawk (Polyboroides radiatus) male and female mating in tree, Reniala Forest, Mangily, Madagascar

Bruno D'Amicis / African harrier-hawk (Polyboroides typus) raiding weaver (Ploceus) nests, Lake Tana Biosphere Reserve. Ethiopia.

Charlie Summers / African Harrier-hawk (Polyboroides typus typus) breaking into a Lilac-breasted roller nest. Serengeti, Tanzania.

Anup Shah / African harrier-Hawk (Polyboroides typus) adult using its legs to probe into cavity nests for young of birds such as swifts and weavers. Maasai Mara National Reserve, Kenya.

Lou Coetzer / African harrier hawk (Polyboroides typus) taking off, Chobe River, Botswana, May.

Mike Wilkes / African harrier hawk (Polyboroides typus) standing on log, Tarangire National Park, Tanzania

David Pattyn / Marsh harrier (Circus aeruginosus) sitting in the reeds. Bulgaria. April

Ann & Steve Toon / African harrier-hawk (Polyboroides typus) juvenile, at water's edge, Chobe National Park, Botswana.

Richard Flack / African harrier hawk (Polyboroides typus) raiding nest of Weaverbird, Nambithi Game Reserve, Ladysmith, South Africa.

Bernard Castelein / Long-tailed glossy starling (Lamprotornis caudatus) mobbing juvenile African harrier hawk (Polyboroides typus). Bansang, Gambia.