1241-117 - Bull Elk (Wapiti) (Cervus canadensis) in autumn willows with tongue out, Jasper National Park, UNESCO World Heritage Site, Alberta, Canada, North America
832-379284 - Southern Giraffes (Giraffa giraffa), three males at dawn, two of them are fighting, Kalahari Desert, Kgalagadi Transfrontier Park, South Africa, Africa
1241-100 - 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
764-5668 - Bison (Bison bison) bull covered with snow in snowfall in the winter, Yellowstone National Park, Wyoming, United States of America, North America
450-4083 - Carved relief of lion overcoming a bull, symbolising the advent of Spring and the Iranian New Year (Nowruz), Apadana Palace, Persepolis, UNESCO World Heritage Site, Iran, Middle East
857-92880 - Bullfighter rodeo clowns try to distract a bull as its rider is bucked to the ground at the Woodlake Lions Rodeo rodeo in Woodlake, Calif., on May 10, 2015.
1112-2960 - California sea lion bull (Zalophus californianus) half above and half below with snorkeler at Los Islotes, Baja California Sur, Mexico, North America
1200-8 - European bison (Bison bonasus) bull walking in snow covered forest habitat in February, Bialowieza National Park, Podlaskie Voivodeship, Poland, Europe
1200-6 - European bison (Bison bonasus) bull, standing in snow covered meadow in February, with yellowhammer (Emberiza citrinella) flock in flight, Bialowieza National Park, Podlaskie Voivodeship, Poland, Europe
1200-3 - European bison (Bison bonasus) bull with radio tracking collar, standing in snow covered forest habitat in February, Bialowieza National Park, Podlaskie Voivodeship, Poland, Europe