Sue Flood / Polar bear peers through window of tourist buggy {Ursus maritimus} Churchill, Canada

Jouan Rius / Cowboy driving cattle, Grand Staircase-Escalante National Monument, Utah, USA, March 2014.

Jouan Rius / Cowboy driving cattle, Grand Staircase-Escalante National Monument, Utah, USA, March 2014.

Angelo Gandolfi / Rancher returning home on horseback on sand beach, Drake bay, Costa Rica.

Jose B. Ruiz / Patagonian Gaucho rider leading another horse, Torres del Paine. Patagonia, Puerto Natales, Chile, April.

Jose B. Ruiz / Horses tethered in snow, Torres del Paine, Patagonia, Puerto Natales, Chile. April.

Jose B. Ruiz / Gaucho with Patagonian flag, Torres del Paine. Patagonia, Puerto Natales, Chile. April 2016.

Iris Thorsteinsdottir / Horse riders herding group of icelandic horses in landscape, Iceland, July 2012.

Pete Oxford / Amerindian cowboy on horseback, Rurununi savanna, Guyana, South America

Pete Oxford / Amerindian cowboy detail of foot and traditional footwear, Rurununi savanna, Guyana, South America

Pete Oxford / Amerindian cowboy gear, Rurununi savanna, Guyana, South America

Pete Oxford / Tommy Kenyon, cowboy on Saddle Mountain (cattle) Ranch, Rurununi savanna, Guyana, South America

Pete Oxford / Tommy Kenyon, holding old family photograph, cowboy on Saddle Mountain (cattle) Ranch, Rurununi savanna, Guyana, South America