David Pattyn / Great black hawk (Buteogallus urubitinga) with a freshly caught fish in talons, Pantanal, Mato Grosso, Brazil, August

Pete Oxford / Great Black Hawk (Buteogallus urubitinga), Yasuni National Park, Amazon, Ecuador

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

Christian Ziegler / Common Black-hawk (Buteogallus anthracinus), near Dangriga, Belize

Luiz Claudio Marigo / Great Black Hawk (Buteogallus urubitinga) perched in a tree. Mato Grosso State, Brazil, October.

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

Pete Oxford / Great black hawk (Buteogallus urubitinga) fishing, Pantanal, Mato Grosso, Brazil

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

Mary McDonald / Great Black Hawk (Buteogallus urubitinga) perched in tree, Pantanal, Brazil.

Mary McDonald / Great Black Hawk (Buteogallus urubitinga) hunting fish, along river, Pantanal, Brazil

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 / Great Black Hawk (Buteogallus urubitinga) juvenile, Peru

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.

Suzi Eszterhas / Great Black Hawk (Buteogallus urubitinga), Pantanal, Brazil

Suzi Eszterhas / Great Black Hawk (Buteogallus urubitinga) hunting, Pantanal, Brazil

Suzi Eszterhas / Great Black Hawk (Buteogallus urubitinga) hunting, Pantanal, Brazil

Suzi Eszterhas / Great Black Hawk (Buteogallus urubitinga) hunting, Pantanal, Brazil

Suzi Eszterhas / Great Black Hawk (Buteogallus urubitinga) hunting, Pantanal, Brazil

Suzi Eszterhas / Great Black Hawk (Buteogallus urubitinga) fishing, Pantanal, Brazil

Suzi Eszterhas / Great Black Hawk (Buteogallus urubitinga) flying, Pantanal, Brazil

Suzi Eszterhas / Great Black Hawk (Buteogallus urubitinga) hunting, Pantanal, Brazil

Suzi Eszterhas / Great Black Hawk (Buteogallus urubitinga), Pantanal, Brazil

Juan Carlos Munoz / Great black hawk (Buteogallus urubitinga) pair perched, Pantanal NP, Mato Grosso, Brazil

Tui De Roy / Brown Pelican (Pelecanus occidentalis) chicks in mangrove nest, Punta Espinosa, Fernandina Island, Galapagos Islands, Ecuador

Tom Vezo / Common black hawk {Buteogallus anthracinus} in flight, Davis Mountains, Texas, USA

David Welling / Common black hawk {Buteogallus anthracinus} juvenile with prey in talons, Mexico, Central America

David Welling / Common black hawk {Buteogallus anthracinus} juvenile, Mexico, Central America

David Welling / Common black hawk {Buteogallus anthracinus} juvenile, Mexico, Central America

Tom Vezo / Common Black-hawk (Buteogallus anthracinus) adult and juvenile on nest, Aravaipa Canyon, Arizona

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

Tom Vezo / Common black hawk + juvenile on nest {Buteogallus anthracinus} Arizona, USA Aravaipa canyon

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

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

Robin Chittenden / Mangrove black hawk (Buteogallus subtilis) on branch, Costa Rica, March

Tom Vezo / Common Black-hawk (Buteogallus anthracinus) calling from perch, Aravaipa Canyon, Arizona