• Results for
    • Sexual Dimorphism
  • (1072)
Variable damselfly (Coenagrion pulchellum) pair mating, De Peel National Park, the Netherlands, July. - Theo  Bosboom
01594921
Theo Bosboom / Variable damselfly (Coenagrion pulchellum) pair mating, De Peel National Park, the Netherlands, July.
Blackcap (Sylvia atricapilla) female and two males huddling together for warmth  while sleeping, Finland, May. - Jussi  Murtosaari
01583463
Jussi Murtosaari / Blackcap (Sylvia atricapilla) female and two males huddling together for warmth while sleeping, Finland, May.
Pintailed whydah (Vidua macroura)  male displaying to female, Masai Mara, Kenya. - Lou Coetzer
01533706
Lou Coetzer / Pintailed whydah (Vidua macroura) male displaying to female, Masai Mara, Kenya.
Red deer (Cervus elaphus) stag and two hinds, Los Alcornocales Natural Park, southern Spain, September. - Andres M. Dominguez
01533379
Andres M. Dominguez / Red deer (Cervus elaphus) stag and two hinds, Los Alcornocales Natural Park, southern Spain, September.
Flock of Mallard ducks (Anas platyrhynchos) taking off, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. December. - Bence  Mate
01531862
Bence Mate / Flock of Mallard ducks (Anas platyrhynchos) taking off, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. December.
Red footed falcon (Falco vespertinus) pair mating, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February. - Bence  Mate
01531796
Bence Mate / Red footed falcon (Falco vespertinus) pair mating, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February.
Red footed falcon (Falco vespertinus) pair mating, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February. - Bence  Mate
01531792
Bence Mate / Red footed falcon (Falco vespertinus) pair mating, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February.
African lion (Panthera leo) male female pair reflected in water, Okavango Delta, Botswana - Wim van den Heever
01529833
Wim van den Heever / African lion (Panthera leo) male female pair reflected in water, Okavango Delta, Botswana
Female Capercaillie (Tetrao urogallus) ready to mate, Vaala, Finland, May. - Markus Varesvuo
01529686
Markus Varesvuo / Female Capercaillie (Tetrao urogallus) ready to mate, Vaala, Finland, May.
Sockeye salmon (Oncorhynchus nerka) interacting in shallow river, males chasing each other while female waits over gravel suitable for depositing her eggs after fertilization. Adams River, British Col... - Brandon Cole
01511113
Brandon Cole / Sockeye salmon (Oncorhynchus nerka) interacting in shallow river, males chasing each other while female waits over gravel suitable for depositing her eggs after fertilization. Adams River, British Col...
Black grouse (Lyrurus tetrix) mating in snow, Utajarvi, Finland, May. - Markus Varesvuo
01498210
Markus Varesvuo / Black grouse (Lyrurus tetrix) mating in snow, Utajarvi, Finland, May.
Bare-faced Curassow (Crax fasciolata) male and female, Near Araras Lodge, Mato Grosso, Northern Pantanal, Brazil, South America. - Nick Garbutt
01493040
Nick Garbutt / Bare-faced Curassow (Crax fasciolata) male and female, Near Araras Lodge, Mato Grosso, Northern Pantanal, Brazil, South America.
Asian paradise-flycatcher (Terpsiphone paradisi) pair perched on branch, Shanyang town, Gutian County, Hubei province, China. - Dong Lei
01492693
Dong Lei / Asian paradise-flycatcher (Terpsiphone paradisi) pair perched on branch, Shanyang town, Gutian County, Hubei province, China.
Capercaillie (Tetrao urogallus) male calling with female, Jalasjarvi, Finland, April - Markus Varesvuo
01490060
Markus Varesvuo / Capercaillie (Tetrao urogallus) male calling with female, Jalasjarvi, Finland, April
Black howler monkeys (Alouatta caraya) male and two females calling from tree, captive, Apenheul Park, Netherlands. - Juan  Carlos Munoz
01448823
Juan Carlos Munoz / Black howler monkeys (Alouatta caraya) male and two females calling from tree, captive, Apenheul Park, Netherlands.
Short-horned grasshoppers (Calliptamus italicus) mating, showing sexual dimorphism, Pescia Romana, Tarquinia, Umbria, Italy, September - Paul  Harcourt Davies
01429256
Paul Harcourt Davies / Short-horned grasshoppers (Calliptamus italicus) mating, showing sexual dimorphism, Pescia Romana, Tarquinia, Umbria, Italy, September
Common blue damselfly {Enallagma cyathigerum}, mating pair, Little Bradley Ponds, Devon, UK. July. 2020VISION Book Plate. - Ross Hoddinott / 2020VISION
01359334
Ross Hoddinott / 2020VISION / Common blue damselfly {Enallagma cyathigerum}, mating pair, Little Bradley Ponds, Devon, UK. July. 2020VISION Book Plate.
Common blue damselfly {Enallagma cyathigerum}, mating pair, Little Bradley Ponds, Devon, UK. July - Ross Hoddinott / 2020VISION
01359333
Ross Hoddinott / 2020VISION / Common blue damselfly {Enallagma cyathigerum}, mating pair, Little Bradley Ponds, Devon, UK. July
Eclectus Parrot (Eclectus roratus) courtship behaviour in rainforest, Cape York Peninsula, North Queensland, Australia, captive - Konrad Wothe
01356707
Konrad Wothe / Eclectus Parrot (Eclectus roratus) courtship behaviour in rainforest, Cape York Peninsula, North Queensland, Australia, captive
Red-footed Falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary - Wild Wonders of Europe / Varesvuo
01233131
Wild Wonders of Europe / Varesvuo / Red-footed Falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary
Red-footed Falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary, May 2008 - Wild Wonders of Europe / Varesvuo
01233125
Wild Wonders of Europe / Varesvuo / Red-footed Falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary, May 2008
Red-footed Falcon (Falco vespertinus) male brings vole prey to female in nestbox, Hortobagy NP, Hungary, May 2008 - Wild Wonders of Europe / Varesvuo
01233118
Wild Wonders of Europe / Varesvuo / Red-footed Falcon (Falco vespertinus) male brings vole prey to female in nestbox, Hortobagy NP, Hungary, May 2008
Red-footed Falcon (Falco vespertinus) pair perched, male on left, Hortobagy NP, Hungary, May 2008 - Wild Wonders of Europe / Varesvuo
01233108
Wild Wonders of Europe / Varesvuo / Red-footed Falcon (Falco vespertinus) pair perched, male on left, Hortobagy NP, Hungary, May 2008
Red-footed falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary, May 2008 - Wild Wonders of Europe / Varesvuo
01233106
Wild Wonders of Europe / Varesvuo / Red-footed falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary, May 2008
Red-footed falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary, May 2008 - Wild Wonders of Europe / Varesvuo
01233105
Wild Wonders of Europe / Varesvuo / Red-footed falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary, May 2008
Red-footed falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary, May 2008 - Wild Wonders of Europe / Varesvuo
01233101
Wild Wonders of Europe / Varesvuo / Red-footed falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary, May 2008
Fur Seal pair mating (Arctocephalus pusillus pusillus) Cape Cross Seal Reserve, Namibia - Anup Shah
01139756
Anup Shah / Fur Seal pair mating (Arctocephalus pusillus pusillus) Cape Cross Seal Reserve, Namibia
Fur Seal pair mating (Arctocephalus pusillus pusillus) Cape Cross Seal Reserve, Namibia - Anup Shah
01139755
Anup Shah / Fur Seal pair mating (Arctocephalus pusillus pusillus) Cape Cross Seal Reserve, Namibia
Fur Seal pair mating (Arctocephalus pusillus pusillus) Cape Cross Seal Reserve, Namibia - Anup Shah
01139754
Anup Shah / Fur Seal pair mating (Arctocephalus pusillus pusillus) Cape Cross Seal Reserve, Namibia
South American / Patagonian sealion pair mating {Otaria flavescens} Valdez peninsula, Argentina. Note large difference in size between male and female - Gabriel Rojo
01130173
Gabriel Rojo / South American / Patagonian sealion pair mating {Otaria flavescens} Valdez peninsula, Argentina. Note large difference in size between male and female
South American / Patagonian sealion pair {Otaria flavescens} on beach, Valdez peninsula, Argentina - Gabriel Rojo
01130171
Gabriel Rojo / South American / Patagonian sealion pair {Otaria flavescens} on beach, Valdez peninsula, Argentina
South American / Patagonian sealion pair {Otaria flavescens} Valdez peninsula, Argentina - Gabriel Rojo
01130169
Gabriel Rojo / South American / Patagonian sealion pair {Otaria flavescens} Valdez peninsula, Argentina
Southern elephant seal pair courtship {Mirounga leonina} Antarctica - Doug Allan
01089443
Doug Allan / Southern elephant seal pair courtship {Mirounga leonina} Antarctica
Southern elephant seal pair courtship {Mirounga leonina} Antarctica. NB Large difference in size of male and female. - Doug Allan
01089442
Doug Allan / Southern elephant seal pair courtship {Mirounga leonina} Antarctica. NB Large difference in size of male and female.
Deep sea Anglerfish male. Male is ten times smaller than female and has well developed olfactory system to help locate females in the darkness, Atlantic ocean - David Shale
01083137
David Shale / Deep sea Anglerfish male. Male is ten times smaller than female and has well developed olfactory system to help locate females in the darkness, Atlantic ocean
Nephilia spider pair on web, Kruger NP, South Africa. Note huge size difference - female is larger. - Ron O'Connor
01036985
Ron O'Connor / Nephilia spider pair on web, Kruger NP, South Africa. Note huge size difference - female is larger.
Banana Spider (Nephila clavipes) female and smaller male, Bocas del Toro, Panama - Thomas Marent
00785629
Thomas Marent / Banana Spider (Nephila clavipes) female and smaller male, Bocas del Toro, Panama
Northern Pintail (Anas acuta) males flying with female in spring courtship display, Montana - Donald M. Jones
00590905
Donald M. Jones / Northern Pintail (Anas acuta) males flying with female in spring courtship display, Montana
Bighorn Sheep (Ovis canadensis) female and male in winter, Jasper National Park, Alberta, Canada - Donald M. Jones
00590758
Donald M. Jones / Bighorn Sheep (Ovis canadensis) female and male in winter, Jasper National Park, Alberta, Canada
Stick Insect (Monticomorpha flavolimbata) pair mating in mountains, Bengoh Range, Ecuador - Chien Lee
00580416
Chien Lee / Stick Insect (Monticomorpha flavolimbata) pair mating in mountains, Bengoh Range, Ecuador
Bighorn Sheep (Ovis canadensis) ewe and ram, western Montana - Donald M. Jones
00578809
Donald M. Jones / Bighorn Sheep (Ovis canadensis) ewe and ram, western Montana
Dall's Sheep (Ovis dalli) ram, lamb, and ewe, Yukon Territory, Canada - Michael Quinton
00572988
Michael Quinton / Dall's Sheep (Ovis dalli) ram, lamb, and ewe, Yukon Territory, Canada
Green Anaconda (Eunectes murinus) female constricting male after copulation, after which she will consume him, Brazil - Luciano Candisani
00568879
Luciano Candisani / Green Anaconda (Eunectes murinus) female constricting male after copulation, after which she will consume him, Brazil
Northern Bobwhite (Colinus virginianus) female and male, Texas - Alan Murphy/ BIA
00563501
Alan Murphy/ BIA / Northern Bobwhite (Colinus virginianus) female and male, Texas
Indian Peafowl (Pavo cristatus) female watching male performing courtship display, Castilla Leon, Spain - Brais Seara Fernandez/ BIA
00559974
Brais Seara Fernandez/ BIA / Indian Peafowl (Pavo cristatus) female watching male performing courtship display, Castilla Leon, Spain
Elk (Cervus elaphus) bull and harem of females and calves along river, Athabasca River, western Canada - Donald M. Jones
00557941
Donald M. Jones / Elk (Cervus elaphus) bull and harem of females and calves along river, Athabasca River, western Canada
Bighorn Sheep (Ovis canadensis) rams, ewe, and lamb, western Canada - Donald M. Jones
00557774
Donald M. Jones / Bighorn Sheep (Ovis canadensis) rams, ewe, and lamb, western Canada
Gambel's Quail (Callipepla gambelii) male at left with female, Arizona - Rick Bowers/ BIA
00556889
Rick Bowers/ BIA / Gambel's Quail (Callipepla gambelii) male at left with female, Arizona
Next page