Nate Chappell/ BIA / Savannah Hawk (Buteogallus meridionalis) juvenile flying, Pantanal, Brazil

Gabriel Rojo / Savanna hawk ( Heterospizias meridionalis) Ibera Marshes, Corrientes Province, Argentina.

Thomas Marent / Savannah Hawk (Buteogallus meridionalis) juvenile, Los Llanos, Colombia

Laurent Geslin / Savanna hawk (Buteogallus meridionalis) Pantanal, Matto Grosso, Brazil.

Mary McDonald / Savanna hawk (Buteogallus meridionalis) on a branch, Pouso Alegre, Pantanal, Mato Grosso, Brazil. August.

Lou Coetzer / Fork tailed drongo (Dicrurus adsimilis) mobbing Martial eagle (Polemaetus bellicosus) taking off, Chobe River, Botswana.

Angelo Gandolfi / Savanna Hawks (Buteogallus meridionalis) one in flight and one perched, Pantanal, Brazil.

Anup Shah / African harrier hawk (Polyboroides typus) investigating a tree trunk, looking for food, Masai Mara National Reserve, Kenya. March

Anup Shah / African harrier hawk (Polyboroides typus) walking up to a tree, Masai Mara National Reserve, Kenya. March

Anup Shah / African harrier hawk (Polyboroides typus) investigating a cavity to see if there is a nest to steal eggs from, Masai Mara National Reserve, Kenya. March

Patricio Robles Gil / Savanna Hawk (Buteogallus meridionalis) taking flight. Parana, Southern Brazil.

Luciano Candisani / Savannah Hawk (Buteogallus meridionalis), Pantanal, Brazil

Pete Oxford / Savanna hawk (Buteogallus meridionalis) perched, savannah, Rupununi, Guyana

Jenny E. Ross / Savanna hawk (Buteogallus meridionalis) pauses while hunting for a rodent in tall grass. Pantanal, Mato Grosso du Sul, Brazil. September

Pete Oxford / Savannah Hawk (Buteogallus meridionalis), Rupununi, Guyana

Murray Cooper / Savannah Hawk (Buteogallus meridionalis) with prey, Ecuador

Murray Cooper / Savannah Hawk (Buteogallus meridionalis) flying and carrying prey, Ecuador

Piper Mackay / Savanna hawk (Buteogallus meridionalis) perching in tree tops, Pantanal, Brazil.

Pete Oxford / Yellow-headed Caracara (Milvago chimachima) perching in tree, Cerrado habitat, Brazil

Pete Oxford / Savannah Hawk (Buteogallus meridionalis) perching in tree, Machalilla National Park, Ecuador

Pete Oxford / Savannah Hawk (Buteogallus meridionalis) perching on snag, Machalilla National Park, Ecuador

Tui De Roy / Savannah Hawk (Buteogallus meridionalis) hunting in savannah grassland habitat, Caiman Ecological Refuge, Pantanal, Brazil

Tui De Roy / Aplomado Falcon (Falco femoralis) in Cerrado habitat, Emas National Park, Brazil

Tui De Roy / Yellow-headed Caracara (Milvago chimachima) perched in treetop in typical Cerrado habitat, Serra de Canastra National Park, Brazil

Hermann Brehm / Savanna hawk {Buteogallus meridionalis} Pantanal, Brazil

Hermann Brehm / Savanna hawk {Buteogallus meridionalis} Pantanal, Brazil

Hermann Brehm / Savanna hawk {Buteogallus meridionalis} predating snake Pantanal, Brazil

John Cancalosi / Savanna hawk (Buteogallus meridionalis) foraging before fire Venezuela

Thomas Marent / Savannah Hawk (Buteogallus meridionalis), Los Llanos, Colombia

Murray Cooper / Savannah Hawk (Buteogallus meridionalis) flying and carrying prey, Ecuador

Bruce Thomson / Savanna hawk (Heterospizias meridionalis) perching on branch, Pocone, Brazil.

David Perpinan / Savannah hawk (Buteogallus meridionalis) using a large rock as a look out post, Pantanal Mato Grosso do Sul, Brazil, December,