Tony Wu / Sardines (Clupeidae) fleeing from predators in the early morning. They were being herded and chased by Trevallies and Blacktip reef sharks in the water, and picked off by brown boobies and terns from...

Arne Hodalic / Nenet herdsman with Reindeer (Rangifer tarandus) during summer migration, Yamal Peninsula, Russia. May.

Angelo Gandolfi / Pantanal cowboy / gaucho (Pantaneiros) driving cattle. Pantanal, Brazil, August 2010.

Loic Poidevin / Sheep (Ovis aries) flock herded together with ear tags and paint markings. Ossoue valley, French Pyrenees, September.

Juergen Freund / Spinner dolphins (Stenella longirostris) being herded towards a tourist resort for the guests to see up close. Papua New Guinea, May 2010.

Martin Willis / Domestic Cattle (Bos taurus) herd being herded by cowboys, Australia

Tony Wu / Sardines (Clupeidae) fleeing from predators in the early morning. They were being herded and chased by trevallies and blacktip reef sharks in the water, and picked off by brown boobies and terns from...

Olga Kamenskaya / Aerial view of Reindeer (Rangifer tarandus) fording water whilst being herded by Nenet herders. Nenets Autonomous Okrug, Arctic, Russia, July 2017

Olga Kamenskaya / Aerial view of Reindeer (Rangifer tarandus) fording water whilst being herded by Nenet herders. Nenets Autonomous Okrug, Arctic, Russia, July 2017

Olga Kamenskaya / Aerial view of Reindeer (Rangifer tarandus) fording water whilst being herded by Nenet herders. Nenets Autonomous Okrug, Arctic, Russia, July 2017

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) killing Yellowfin Tuna (Thunnus albacares) prey, after it was herded into shallow water, Punta Albemarle, Isabela Island, Galapagos Islands, Ecuador

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) feeding on Yellowfin Tuna (Thunnus albacares) prey, which it herded into shallow water, Punta Albemarle, Isabela Island, Galapagos Islands, Ecuador