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Antarctic fur seal bull (Arctocephalus gazella) on South Georgia, Southern Ocean, Polar Regions
Antarctic fur seal bull (Arctocephalus gazella) on South Georgia, Southern Ocean, Polar Regions
Cape buffalo (African buffalo) (Syncerus caffer) bull, Kruger National Park, South Africa, Africa
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
Exhibits on display inside the Archaeological Museum of Olympia, Peloponnese, Greece, Europe
Bull elk (Cervus canadensis), Jasper National Park, Alberta, Canada, North America
An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America
Pavilion at the Ne Olle Bulls Square, Bergen, Hordaland, Norway, Scandinavia, Europe
Staffordshire Bull Terrier standing in a green field, United Kingdom, Europe
Adult bull Type A killer whale (Orcinus orca) power lunging in the Gerlache Strait, Antarctica, Polar Regions
Bison (Bison bison) bull covered with frost in the winter, Yellowstone National Park, Wyoming, United States of America, North America
Adult bull Type A killer whale (Orcinus orca) surfacing in the Gerlache Strait, Antarctica, Polar Regions
Southern elephant seal bulls (Mirounga leonina) charging on the beach in Gold Harbor, South Georgia, Polar Regions
Charging southern elephant seal bull (Mirounga leonina), St. Andrews Bay, South Georgia, Polar Regions
Adult bull Antarctic fur seal (Arctocephalus gazella), head detail, Stromness Harbor, South Georgia, Polar Regions
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
Charging Bull and Olive Tree Fresco, The Minoan Palace of Knossos, Knossos, Heraklion, Crete, Greek Islands, Greece, Europe
Large Bull Elk (Cervus canadensis) standing in deep snow during winter in Banff National Park, UNESCO World Heritage Site, Alberta, The Rockies, Canada, North America
Bull Elk (Wapiti) (Cervus canadensis) in autumn willows with tongue out, Jasper National Park, UNESCO World Heritage Site, Alberta, Canada, North America
Bull Elk (Wapiti) (Cervus canadensis) in autumn willows, Jasper National Park, UNESCO World Heritage Site, Alberta, Canada, North America
Young southern elephant seal bulls (Mirounga leoninar), mock-fighting on the beach in Gold Harbor, South Georgia, Polar Regions
Young southern elephant seal bull (Mirounga leoninar), molting on the beach in Gold Harbor, South Georgia, Polar Regions
A pair of adult bull Antarctic fur seals (Arctocephalus gazella), fighting in Right Whale Bay, South Georgia, South Atlantic, Polar Regions
Mundari man with a Kalashnikov posing with a bull with giant horns, Mundari tribe, South Sudan, Africa
Boy and girl riding on a donkey to a waterhole in the lowlands of Eritrea, Africa
Adult bull southern elephant seal (Mirounga leonina) attempting to cool off by flinging sand on his back, South Georgia, Polar Regions
Bull southern elephant seal (Mirounga leonina) issuing a bellowing challenge at Gold Harbour on South Georgia Island, Polar Regions
Adult bull southern elephant seal (Mirounga leonina) issuing a bellow towards another male, Gold Harbour, South Georgia, Polar Regions
Southern elephant seal (Mirounga leonina) bull holding adult female in the surf to mate with her, South Georgia, Polar Regions
Adult bull southern elephant seal (Mirounga leonina) fleeing from another male challenger at Gold Harbour, South Georgia, Polar Regions
Southern elephant seal (Mirounga leonina) bull holding adult female in the surf to mate with her, South Georgia, Polar Regions
Southern elephant seal (Mirounga leonina) bull holding adult female in the surf to mate with her, South Georgia, Polar Regions
Northern (Steller) sea lion (Eumetopias jubatus) bull feeding on fisherman's scraps near Petersburg, Alaska, United States of America, North America
An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America
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 walrus (Odobenus rosmarus rosmarus) hauled out on the beach 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
Young Galapagos sea lion bulls (Zalophus wollebaeki) mock-fighting in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Elephant (Loxodonta africana) bull in Chobe river at sunset, Chobe National Park, Botswana, Africa
An adult bull among a pod of about 20 killer whales (Orcinus orca) in Antarctic Sound near the Antarctic Peninsula, Polar Regions
An adult bull among a pod of about 20 killer whales (Orcinus orca) in Antarctic Sound near the Antarctic Peninsula, Polar Regions
Adult bull Atlantic walrus (Odobenus rosmarus rosmarus) on the beach in Torellneset, Nordauslandet, Svalbard, Arctic, Norway, Scandinavia, Europe
Antarctic fur seal bull (Arctocephalus gazella) on South Georgia, Southern Ocean, 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
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
An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America
Charging Bull and Olive Tree Fresco, The Minoan Palace of Knossos, Knossos, Heraklion, Crete, Greek Islands, Greece, Europe
An adult bull porcupine caribou (Rangifer tarandus granti), hiding in fall color changes in Denali National Park, Alaska, United States of America, North America
Young southern elephant seal bulls (Mirounga leoninar), mock-fighting on the beach in Gold Harbor, South Georgia, Polar Regions
Young southern elephant seal bulls (Mirounga leoninar), molting on the beach in Gold Harbor, South Georgia, Polar Regions
California sea lion bulls (Zalophus californianus), hauled out on a small islet off San Marcos Island, Sea of Cortez, Mexico, North America
A bull sea lion sleeping on the beach Otago Peninsula, Otago, South Island, New Zealand, Pacific
Adult bull southern elephant seal (Mirounga leonina), skull on display at the Natural History Museum in Stanley, Falklands, South America
Beachmaster bull southern elephant seal (Mirounga leonina) attempting to mate at Peggotty Bluff, South Georgia, Polar Regions
Beachmaster bull southern elephant seal (Mirounga leonina) attempting to mate at Peggotty Bluff, South Georgia, Polar Regions
Adult beachmaster bull southern elephant seal (Mirounga leonina) holding female down with his weight, South Georgia, Polar Regions
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) issuing a bellowing challenge at Gold Harbour on South Georgia, Polar Regions
Adult bull southern elephant seal (Mirounga leonina) issuing a bellowing challenge at Gold Harbour on South Georgia, Polar Regions
Adult bull southern elephant seal (Mirounga leonina) trying to cool off by flinging sand on his back at Gold Harbour, South Georgia, Polar Regions
Adult beachmaster bull southern elephant seal (Mirounga leonina) challenging another male at Gold Harbour, South Georgia, Polar Regions
Southern elephant seal (Mirounga leonina) challenger bull head detail (notice shredded proboscis) at Gold Harbour, South Georgia, Polar Regions
Adult bull southern elephant seal (Mirounga leonina) with females and pups at Gold Harbour on South Georgia Island, Polar Regions
Southern elephant seal (Mirounga leonina) bull issuing a vocalization challenge at Gold Harbour on South Georgia, Polar Regions
Southern elephant seal (Mirounga leonina) challenger bull in the surf at Gold Harbour on South Georgia Island, Polar Regions
Southern elephant seal (Mirounga leonina) bull holding adult female in the surf to mate with her, South Georgia, Polar Regions
Southern elephant seal (Mirounga leonina) bull holding adult female in the surf to mate with her, South Georgia, Polar Regions
Southern elephant seal (Mirounga leonina) bull holding adult female in the surf to mate with her, South Georgia, Polar Regions
Southern elephant seal (Mirounga leonina) challenger bull head detail at Gold Harbour on South Georgia Island, Polar Regions
An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America
Adult bull walrus (Odobenus rosmarus rosmarus) hauled out on the beach 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 walrus (Odobenus rosmarus rosmarus) hauled out on the beach in the Svalbard Archipelago, Norway, Arctic, Europe
Young Galapagos sea lion bulls (Zalophus wollebaeki) mock-fighting in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Adult bull southern elephant seal (Mirounga leonina) hauled out to molt at Grytviken on South Georgia, Polar Regions
An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions
An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions
An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions
An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions
An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions
An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions
Adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions