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Southern elephant seal (Mirounga leonina) bull rules the harem during breeding season, Sea Lion Island, Falkland Islands, South America
Scarred Southern elephant seal (Mirounga leonina) bull and Cobb's wren (Troglodytes cobbi), Sea Lion Island, Falkland Islands, South America
Southern elephant seal (Mirounga leonina) bull departs after lost battle, Sea Lion Island, Falkland Islands, South America
Little and Large, new born southern elephant seal (Mirounga leonina) pup with adult male bull, Sea Lion Island, Falkland Islands, South America
Southern elephant seal (Mirounga leonina) bull uses vocalisation and produces steam, Sea Lion Island, Falkland Islands, South America
Resident killer whale bull, Orcinus orca, Cattle Pass, San Juan Island, Washington, United States of America, North America
Adult bull southern elephant seal, Mirounga leonina, in tussock grass, Jason Harbour, South Georgia Island, Atlantic Ocean
Running of the Bulls in Sao Mateus village on Terceira Island, Azores, Portugal, Atlantic, Europe
Running of the Bulls in Sao Mateus village on Terceira Island, Azores, Portugal, Atlantic, Europe
Running of the Bulls in Sao Mateus village on Terceira Island, Azores, Portugal, Atlantic, Europe
Running of the Bulls in Sao Mateus village on Terceira Island, Azores, Portugal, Atlantic, Europe
Adult bull southern elephant seal, Mirounga leonina, proboscis detail, Fortuna Bay, South Georgia Island, Atlantic Ocean
A curious bull killer whale (Orcinus orca) near the National Geographic Explorer off the Cumberland Peninsula, Baffin Island, Nunavut, Canada, North America
Running of the Bulls in Sao Mateus village on Terceira Island, Azores, Portugal, Atlantic, Europe
Adult bull southern elephant seals, Mirounga leonina, fighting for territory in Gold Harbour, South Georgia Island, Atlantic Ocean
Adult bull southern elephant seal, Mirounga leonina, hauled out at Grytviken, South Georgia Island, Atlantic Ocean
Antarctic fur seal (Arctocephalus gazella) bulls establishing mating territories at the abandoned Stromness Whaling Station, South Georgia Island, South Atlantic Ocean, Polar Regions
Resident killer whale bull, Orcinus orca, Cattle Pass, San Juan Island, Washington, United States of America, North America
A bull sea lion in the shallow waters around Rabida Island, Galapagos, Ecuador, South America
Adult bull Antarctic fur seal, Arctocephalus gazella, head detail at Ocean Harbour, South Georgia Island, Atlantic Ocean
Galapagos fur seal (Arctocephalus galapagoensis) bulls mock-fighting underwater, Genovesa Island, Galapagos Islands, Ecuador, South America
Antarctic fur seal (Arctocephalus gazella) bulls establishing mating territories at the abandoned Grytviken Whaling Station, South Georgia Island, South Atlantic Ocean, Polar Regions
Young bull southern elephant seals, Mirounga leonina, fighting for territory in Gold Harbour, South Georgia Island, Atlantic Ocean
Adult bull southern elephant seal, Mirounga leonina, with female and pup, Gold Harbour, South Georgia Island, Atlantic Ocean
Young bull southern elephant seal, Mirounga leonina, sneaking near female, Gold Harbour, South Georgia Island, Atlantic Ocean
Antarctic fur seal (Arctocephalus gazella) bulls establishing mating territories at the abandoned Stromness Whaling Station, South Georgia Island, South Atlantic Ocean, Polar Regions
Young bull southern elephant seals, Mirounga leonina, fighting for territory in Gold Harbour, South Georgia Island, Atlantic Ocean
Galapagos fur seal (Arctocephalus galapagoensis) bulls mock-fighting underwater, Genovesa Island, Galapagos Islands, Ecuador, South America
Galapagos fur seal (Arctocephalus galapagoensis) bulls mock-fighting underwater, Genovesa Island, Galapagos Islands, Ecuador, South America
Galapagos fur seal (Arctocephalus galapagoensis) bulls mock-fighting, Genovesa Island, Galapagos Islands, Ecuador, South America
Galapagos fur seal (Arctocephalus galapagoensis) bulls mock-fighting underwater, Genovesa Island, Galapagos Islands, Ecuador, South America
Antarctic fur seal (Arctocephalus gazella) bulls establishing mating territories at the abandoned Stromness Whaling Station, South Georgia Island, South Atlantic Ocean, Polar Regions
Galapagos fur seal (Arctocephalus galapagoensis) bulls mock-fighting underwater, Genovesa Island, Galapagos Islands, Ecuador, South America
Southern elephant seal (Mirounga leonina) challenger bull in the surf at Gold Harbour on South Georgia Island, Polar Regions
Southern elephant seal (Mirounga leonina) challenger bull head detail at Gold Harbour on South Georgia Island, Polar Regions
Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe
Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe
Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe
Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe
Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe
Adult bull southern elephant seal (Mirounga leonina) flipping sand onto its back to cool off on South Georgia Island, Southern Ocean
Bull southern elephant seal (Mirounga leonina) on South Georgia Island, Southern Ocean
Adult bull southern elephant seals (Mirounga leonina) fighting for breeding grounds on South Georgia Island, Southern Ocean
Adult bull southern elephant seals (Mirounga leonina) fighting for breeding grounds on South Georgia Island, Southern Ocean
Bull southern elephant seal (Mirounga leonina) on South Georgia Island, Southern Ocean
Bull southern elephant seal (Mirounga leonina) on South Georgia Island, Southern Ocean
Adult bull southern elephant seals (Mirounga leonina) fighting for breeding grounds on South Georgia Island, Southern Ocean
Adult bull Galapagos fur seal (Arctocephalus galapagoensis) underwater on Genovesa Island, Galapagos, Ecuador, South America
Bull Galapagos sea lion (Zalophus wollebaeki) with snorkeler underwater at Santiago Island, Galapagos, Ecuador, South America
A bull sea lion sleeping on the beach Otago Peninsula, Otago, South Island, New Zealand, Pacific
Bull southern elephant seal (Mirounga leonina) issuing a bellowing challenge at Gold Harbour on South Georgia Island, Polar Regions
Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe
Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe
Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe
Adult bull Galapagos sea lion (Zalophus wollebaeki) posturing on Fernandina Island in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Bull southern elephant seal (Mirounga leonina) on South Georgia Island, Southern Ocean
Bull southern elephant seal (Mirounga leonina) on South Georgia Island, Southern Ocean
Bull southern elephant seal (Mirounga leonina) on South Georgia Island, Southern Ocean
Bull southern elephant seal (Mirounga leonina) on South Georgia Island, Southern Ocean
Bull southern elephant seal (Mirounga leonina) on South Georgia Island, Southern Ocean
Bull southern elephant seal (Mirounga leonina) on South Georgia Island, Southern Ocean
Bull southern elephant seal (Mirounga leonina) on South Georgia Island, Southern Ocean
Young adult bull southern elephant seal (Mirounga leonina) holding young pup's head underwater trying to kill it, South Georgia Island, Southern Ocean
Young adult bull southern elephant seal (Mirounga leonina) holding young pup's head underwater trying to kill it, South Georgia Island, Southern Ocean
Adult bull southern elephant seals (Mirounga leonina) fighting for breeding grounds on South Georgia Island, Southern Ocean
Young adult bull southern elephant seal (Mirounga leonina) close up while swimming in glacier run off, South Georgia Island, Polar Regions
Young challenger bull southern elephant seal (Mirounga leonina) fleeing from beachmaster bull, South Georgia Island, Polar Regions
Adult bull southern elephant seal (Mirounga leonina) mating in the surf at Gold Harbour on South Georgia Island, Polar Regions
Adult bull southern elephant seal (Mirounga leonina) with females and pups at Gold Harbour on South Georgia Island, Polar Regions
Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe
Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe
Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe
An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions
Antarctic fur seal bull (Arctocephalus gazella) on South Georgia, Southern Ocean, Polar Regions
Bull southern elephant seal (Mirounga leonina) on South Georgia Island, Southern Ocean
Adult Antarctic fur seal (Arctocephalus gazella), bull and cow on Prion Island, South Georgia Island, South Atlantic, Polar Regions
View over the Bull island Sant'Antioco Sardinia, Italy, Mediterranean, Europe
Antarctic fur seal harem (Arctocephalus gazella) at the old whaling station at Grytviken, South Georgia Island, Polar Regions
Two adult bull southern elephant seals (Mirounga leonina), fighting on the beach on Snow Island, Antarctica, Polar Regions
Antarctic fur seal (Arctocephalus gazella) adult bull, Prion Island, South Georgia, UK Overseas Protectorate, Polar Regions
Bull Galapagos sea lion (Zalophus wollebaeki) underwater at Santiago Island, Galapagos, Ecuador, South America
Four adult bull southern elephant seals (Mirounga leonina), fighting on the beach on Snow Island, Antarctica, Polar Regions
A bull Antarctic fur seal (Arctocephalus gazella), on the rocks at Coronation Island, South Orkneys, Antarctica, Polar Regions
Two adult bull southern elephant seals (Mirounga leonina), fighting on the beach on Snow Island, Antarctica, Polar Regions
Two young bull southern elephant seals (Mirounga leonina), fighting on the beach on Snow Island, Antarctica, Polar Regions
Galapagos sea lion (Zalophus wollebaeki) adult bull, Fernandina Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Gentoo penguin (Pygoscelis papua) at nesting site on Bull Point, East Island, Falkland Islands, South America
Wild male bull bison (buffalo) in summer, Elk Island National Park, Alberta, Canada, North America
Gentoo penguins (Pygoscelis papua) at nesting site on Bull Point, East Island, Falkland Islands, South America
Adult bull northern fur seal (Callorhinus ursinus) on St. Paul Island, Pribilof Islands, Alaska, United States of America, North America
Adult bull Antarctic fur seal (Arctocephalus gazella) with his harem of females, Godthul, South Georgia Island, Polar Regions
Gentoo penguins (Pygoscelis papua) at nesting site on Bull Point, East Island, Falkland Islands, South America
Two young bull southern elephant seals (Mirounga leonina), fighting on the beach on Snow Island, Antarctica, Polar Regions
Adult bull northern elephant seal (Mirounga angustirostris), Benito del Oeste Island, Baja California, Mexico, North America
Adult bull killer whale (Orcinus orca), surfacing off Kagamil Island, Aleutian Islands, Alaska, United States of America, North America
Gentoo penguins (Pygoscelis papua) at nesting site on Bull Point, East Island, Falkland Islands, South America
Bull in a meadow near Waiuku on North Island in New Zealand
Bull scenting cow on a farm near Waiuku on North Island in New Zealand
Bull scents cow on a farm near Waiuku on North Island in New Zealand
Collection of statues and artefacts of the Minoan civilization, Heraklion Archaeological Museum, Crete island, Greek Islands, Greece, Europe