Alan Murphy / Cooper's Hawk (Accipiter cooperii) flying, Texas

John Chan / Cooper's hawk (Accipiter cooperii) nestling sleeping Southern California, USA.

John Chan / Cooper's hawk (Accipiter cooperii) nestling pecking sibling, Southern California, USA, June.

Alan Murphy/ BIA / Cooper's Hawk (Accipiter cooperii) flying, Texas

Murray Cooper / Barred Hawk (Leucopternis princeps) with snake prey, Ecuador

Murray Cooper / Aplomado Falcon (Falco femoralis) flying, Ecuador

Murray Cooper / Red-backed Hawk (Buteo polyosoma) flying, Ecuador

Murray Cooper / Orange-breasted Falcon (Falco deiroleucus) parent with chick at nest ledge, Ecuador

Alan Murphy/ BIA / Cooper's Hawk (Accipiter cooperii) female feeding on bird prey, Texas

Alan Murphy/ BIA / Cooper's Hawk (Accipiter cooperii) female protecting prey, Texas

Alan Murphy/ BIA / Cooper's Hawk (Accipiter cooperii) female flying, Texas

Alan Murphy/ BIA / Cooper's Hawk (Accipiter cooperii) female, Texas

Alan Murphy/ BIA / Cooper's Hawk (Accipiter cooperii) female, Texas

Alan Murphy/ BIA / Cooper's Hawk (Accipiter cooperii) female landing, Texas

Alan Murphy/ BIA / Cooper's Hawk (Accipiter cooperii) female flying, Texas

Alan Murphy / Cooper's Hawk (Accipiter cooperii) flying, Texas

Alan Murphy / Cooper's Hawk (Accipiter cooperii) flying, Texas

Alan Murphy / Cooper's Hawk (Accipiter cooperii) taking flight, Texas

Alan Murphy / Cooper's Hawk (Accipiter cooperii) flying, Texas

Alan Murphy / Cooper's Hawk (Accipiter cooperii) flying, Texas

Alan Murphy / Cooper's Hawk (Accipiter cooperii) flying with Northern Bobwhite (Colinus virginianus) prey, Texas

Alan Murphy / Cooper's Hawk (Accipiter cooperii) hunting, Texas

Alan Murphy / Cooper's Hawk (Accipiter cooperii), Texas

Alan Murphy / Cooper's Hawk (Accipiter cooperii) flying with prey, Texas

Alan Murphy / Cooper's Hawk (Accipiter cooperii) with bird prey, Texas

Nick Saunders / Cooper's Hawk (Accipiter cooperii) with prey, Saskatoon, Saskatchewan, Canada

Alan Murphy / Cooper's Hawk (Accipiter cooperii) juvenile, Texas

Alan Murphy / Cooper's Hawk (Accipiter cooperii) juvenile, Texas

Alan Murphy / Cooper's Hawk (Accipiter cooperii), Texas

Alan Murphy / Cooper's Hawk (Accipiter cooperii) juvenile, Texas

E.J. Peiker / Cooper's Hawk (Accipiter cooperii), New Jersey

Tom Vezo / Cooper's Hawk (Accipiter cooperii) juvenile, Green Valley, Arizona

Murray Cooper / Barred Hawk (Leucopternis princeps) with snake prey, Andes, Ecuador

Diane McAllister / Cooper's hawk (Accipiter cooperii) chick standing in nest in a suburban neighborhood in Reno. Nevada, USA, June

Diane McAllister / Cooper's hawk (Accipiter cooperii) fledgling standing one-legged on a branch while hunting in suburban neighborhood in Reno. Nevada, USA, July

Murray Cooper / Aplomado Falcon (Falco femoralis) flying, Andes, Ecuador

Floris van Breugel / Juvenile Cooper's Hawk (Accipiter cooperii) standing among the autumn colours, Eaton Canyon, California, USA

Murray Cooper / White Hawk (Leucopternis albicollis), Ecuador

Murray Cooper / Great Black Hawk (Buteogallus urubitinga) juvenile, Peru

Murray Cooper / Carunculated Caracara (Phalcoboenus carunculatus), Ecuador

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

Murray Cooper / Gray Hawk (Buteo nitidus) calling from perch, Ecuador

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

Murray Cooper / Laughing Falcon (Herpetotheres cachinnans) on nest, Ecuador

Murray Cooper / Laughing Falcon (Herpetotheres cachinnans) at nest, Ecuador

Murray Cooper / Laughing Falcon (Herpetotheres cachinnans), Colombia

Murray Cooper / Hawk Moth (Sphingidae) caterpillar, western slope of Andes

Murray Cooper / Hawk Moth (Sphingidae) caterpillar feet, western slope of Andes

Murray Cooper / Hawk Moth (Sphingidae) caterpillar, western slope of Andes

Tim Fitzharris / Cooper's Hawk (Accipiter cooperii) flying over Quaking Aspen (Populus tremuloides) forest, Santa Fe National Forest, Sangre de Cristo Mountains, New Mexico

Sebastian Kennerknecht / Cooper's Hawk (Accipiter cooperii), Santa Cruz, Monterey Bay, California

Donald M. Jones / Cooper's Hawk (Accipiter cooperii) male perching on a snag, western Montana

Andrew Cooper / Caterpillar larva of Pine hawkmoth {Sphinx pinastri} UK

Tom Vezo / Cooper's Hawk (Accipiter cooperii) on Saguaro husk, Green Valley, Arizona

Tom Vezo / Coopers hawk {Accipiter cooperii} perching in dead tree, Cape May, New Jersey, USA

David Welling / Cooper's hawk {Accipiter cooperii} juvenile at water, Texas, USA

Tom Vezo / Cooper's hawk {Accipiter cooperii} perched on cardon cactus, Sonora, Mexico

Tom Vezo / Cooper's hawk, juvenile {Accipiter cooperii} Arizona, US

Tom Vezo / Cooper's hawk, juvenile {Accipiter cooperii} Arizona, USA.

Tom Vezo / Cooper's hawk {Accipiter cooperii} on Saguaro cactus skeleton, Arizona, USA.

Tom Vezo / Cooper's hawk {Accipiter cooperii} perched on cardon cactus, Sonora, Mexico

Tom Vezo / Cooper's hawk {Accipiter cooperii} perched on cardon cactus, Sonora, Mexico

Tom Vezo / Cooper's Hawk (Accipiter cooperii) adult perched on dead giant Saguaro cactus, Green Valley, Arizona

Tom Vezo / Cooper's Hawk (Accipiter cooperii) mantling prey, Chiricahua Mountains, Arizona

Tom Vezo / Cooper's Hawk (Accipiter cooperii) flying, Cape May, New Jersey

Tom Vezo / Cooper's hawk with prey {Accipiter cooperii} Arizona, USA

Tom Vezo / Cooper's hawk with pigeon prey {Accipiter cooperii} Arizona, USA Chiricahua mtns

Tom Vezo / Coopers hawk perched. {Accipiter cooperii} Cape May, NJ, USA. Autumn, New Jersey

Murray Cooper / Savannah Hawk (Buteogallus meridionalis), South America

Murray Cooper / Savannah Hawk (Buteogallus meridionalis), South America

Murray Cooper / Black-collared Hawk (Busarellus nigricollis) flying, South America

Alan Murphy/ BIA / Cooper's Hawk (Accipiter cooperii) male flying, Texas

Murray Cooper / Carunculated Caracara (Phalcoboenus carunculatus) flying, Andes, Ecuador

Tom Vezo / Cooper's Hawk (Accipiter cooperii) juvenile in shallow water, Green Valley, Arizona

Murray Cooper / Barred Hawk (Leucopternis princeps) with chick and snake prey at nest, Andes, Ecuador

Murray Cooper / Barred Hawk (Leucopternis princeps) with chick and snake prey in nest, Andes, Ecuador

Murray Cooper / Aplomado Falcon (Falco femoralis), Andes, Ecuador

Murray Cooper / Aplomado Falcon (Falco femoralis) feeding chicks at nest, Andes, Ecuador

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

Tom Vezo / Coopers hawk with prey {Accipiter cooperii} Arizona USA Chiricahua mtns

Tom Vezo / Coopers hawk with prey {Accipiter cooperii} Arizona USA Chiricahua mtns

Daniel Heuclin / Cooper's hawk (Accipiter cooperii) chicks in nest, Catalina State Park, Arizona, USA.

Daniel Heuclin / Cooper's hawk (Accipiter cooperii) chicks in nest, Catalina State Park, Arizona, USA.

Daniel Heuclin / Cooper's hawk (Accipiter cooperii) perched on branch, calling, Catalina State Park, Arizona, USA.

Andy Trowbridge / Swamp harrier (Circus approximans) mantling its prey, a Pukeko (Porphyrio porphyrio), Cooper's Lagoon, Canterbury, New Zealand.

Andy Trowbridge / Swamp harrier (Circus approximans) covering it's prey, a Pukeko (Porphyrio porphyrio), with it's wings, Cooper's Lagoon, Canterbury, New Zealand.

Andy Trowbridge / Swamp harrier (Circus approximans) covering it's prey, a mallard duck (Anas platyrhynchos), with wings, Cooper's Lagoon, Canterbury, New Zealand.