Robert Valentic / Carpentaria snake {Cryptophis boschmai} female, a nocturnal frog-eating species, Alpha, Queensland, Australia

Yva Momatiuk & John Eastcott / Gray Wolf (Canis lupus) alpha female with large collar put on by wolf biologist to study her movement, walking on gravel park road in evening while returning to her pups after hunting for food for the...

Yva Momatiuk & John Eastcott / Gray Wolf (Canis lupus) a family group consisting of alpha parents, pups and young offspring, travel together, crossing colorful tundra hillside in fall, Denali National Park, Alaska

WILLIAM OSBORN / Alpha - typical Queensland town, on the Tropic of Capricorn, Central Queensland, Australia

Ingo Arndt / Chimpanzee (Pan troglodytes) alpha male 'Kris' knucklewalking across log, endangered, Gombe Stream National Park, Tanzania

Ingo Arndt / Chimpanzee (Pan troglodytes) alpha male 'Kris' portrait, endangered, Gombe Stream National Park, Tanzania

Peter Scoones / Southern elephant seal {Mirounga leonina} blooded alpha bull sleeping face portrait, South Georgia, Antarctica.

Jean-Pierre Zwaenepoel / Rhesus macaque {Macaca mulatta} alpha male yawning, Keoladeo Ghana NP, Rajasthan, India

Jean-Pierre Zwaenepoel / Southern plains grey / Hanuman langur {Semnopithecus dussumieri} male tends wound after fight with alpha male, Thar desert, Rajasthan, India

Jean-Pierre Zwaenepoel / Rhesus macaque {Macaca mulatta} alpha male with juveniles, Keoladeo Ghana NP, Bharatpur, Rajasthan, India

Jean-Pierre Zwaenepoel / Southern plains grey / Hanuman langur {Semnopithecus dussumieri} alpha male displaying, Thar desert, Rajasthan, India

Michael & Patricia Fogden / Stars including Alpha Beta, Centauri and the Southern Cross, Spitzkop, Damaraland, Namibia

Michael & Patricia Fogden / Stars including Alpha Beta, Centauri and the Southern Cross, Spitzkop, Damaraland, Namibia

Michael & Patricia Fogden / Stars including Alpha Beta, Centauri and the Southern Cross, Spitzkop, Damaraland, Namibia

Jim Brandenburg / Arctic Wolf (Canis lupus) alpha male named Buster near den site, Ellesmere Island, Nunavut, Canada

Jim Brandenburg / Arctic Wolf (Canis lupus) alpha male named Buster near den site, Ellesmere Island, Nunavut, Canada

Jim Brandenburg / Arctic Wolf (Canis lupus) alpha male named Buster near den site, Ellesmere Island, Nunavut, Canada

Jim Brandenburg / Timber Wolf (Canis lupus) alpha female resting in snow while yearling displays affection to her, Minnesota

Jim Brandenburg / Timber Wolf (Canis lupus) alpha female in snow storm, Minnesota

Jim Brandenburg / Timber Wolf (Canis lupus) female in white phase, Minnesota

Jim Brandenburg / Timber Wolf (Canis lupus) alpha male asserting dominance over another pack member at White-tailed Deer (Odocoileus virginianus) carcass, Minnesota

Jim Brandenburg / Timber Wolf (Canis lupus) juveniles in ritual greeting of alpha wolf, Minnesota

Jim Brandenburg / Timber Wolf (Canis lupus) juveniles in ritual greeting of alpha wolf, Minnesota

Justine Evans / White handed gibbon alpha male grooms female {Hylobates lar} Khao Yai NP, Thailand

Justine Evans / White handed gibbon (Hylobates lar) alpha male feeding in fig tree in tropical rainforest, Khao NP, Thailand

Justine Evans / White handed gibbon, alpha female {Hylobates lar} in tropical rainforest, Khao Yai

Justine Evans / White handed gibbon, alpha male in fig tree {Hylobates lar} Khao Yai NP, Thailand, tropical

Justine Evans / White handed gibbon, alpha male leaping {Hylobates lar} tropical rainforest, Khao Yai NP,

Anup Shah / Chimpanzees gather around alpha male 'Frodo' begging for share of Bushbuck fawn prey {Pan troglodytes schweinfurtheii}, Kasekela community, Gombe NP, Tanzania. 2002

Anup Shah / Chimpanzees gather around alpha male 'Frodo' begging for share of Bushbuck fawn prey {Pan troglodytes schweinfurtheii}, Kasekela community, Gombe NP, Tanzania. 2002

Jabruson / Dwarf mongoose alpha male {Helogale parvula} foraging. Tsavo East NP, Kenya

Asgeir Helgestad / Man with Alpha male and female European grey wolves {Canis lupus} Norway

Paul D Stewart / Illustration frontispiece from Thomas Burnet's 'The Sacred Theory of the Earth' 1684, the most popular geological work of the 17th century. Christ stands aside the full cycle of creation with the epit...

Philip Stephen / Beryl Alpha Oil Production Platform, located in the UK sector of the North Sea, approximately 315 kilometres north-east of Aberdeen. August 2006.

Philip Stephen / Beryl Alpha Oil Production Platform, located in the UK sector of the North Sea, approximately 315 kilometres north-east of Aberdeen. August 2006.

Konrad Wothe / Chimpanzee (Pan troglodytes) alpha male walking through forest, Mahale Mountains National Park, Tanzania

Ingo Arndt / Chimpanzee (Pan troglodytes) alpha male 'Kris' yawning, endangered, Gombe Stream National Park, Tanzania

Bernard Walton / Mandrill male sitting on log {Mandrillus sphinx} captive, Franceville, Gabon