• Results for
    • Dimorphism
  • (1571)
Variable damselfly (Coenagrion pulchellum) pair mating, De Peel National Park, the Netherlands, July. - Theo  Bosboom
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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Paul Harcourt Davies / Short-horned grasshoppers (Calliptamus italicus) mating, showing sexual dimorphism, Pescia Romana, Tarquinia, Umbria, Italy, September
Cavalier King Charles Spaniels, ruby and tricolour, sitting in snow. - Petra Wegner
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Petra Wegner / Cavalier King Charles Spaniels, ruby and tricolour, sitting in snow.
Common blue damselfly {Enallagma cyathigerum}, mating pair, Little Bradley Ponds, Devon, UK. July. 2020VISION Book Plate. - Ross Hoddinott / 2020VISION
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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
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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
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Konrad Wothe / Eclectus Parrot (Eclectus roratus) courtship behaviour in rainforest, Cape York Peninsula, North Queensland, Australia, captive
Eclectus Parrot (Eclectus roratus) pair in rainforest, female on right, Cape York Peninsula, North Queensland, Australia, captive - Konrad Wothe
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Konrad Wothe / Eclectus Parrot (Eclectus roratus) pair in rainforest, female on right, Cape York Peninsula, North Queensland, Australia, captive
Group portrait of three Chihuahua puppies, sitting on white towels - Aflo
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Aflo / Group portrait of three Chihuahua puppies, sitting on white towels
Two Cavalier King Charles Spaniels, blenheim and tricolour coated, sitting wearing reindeer antlers - Petra Wegner
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Petra Wegner / Two Cavalier King Charles Spaniels, blenheim and tricolour coated, sitting wearing reindeer antlers
Five Cavalier King Charles Spaniel sitting, black-and-tan, tricolour, blenheim and ruby coated, sitting in autumn leaves - Petra Wegner
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Petra Wegner / Five Cavalier King Charles Spaniel sitting, black-and-tan, tricolour, blenheim and ruby coated, sitting in autumn leaves
Two Miniature Schnauzers, black-silver and pepper-and-salt coated, sitting in autumn foliage - Petra Wegner
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Petra Wegner / Two Miniature Schnauzers, black-silver and pepper-and-salt coated, sitting in autumn foliage
British Longhair Cats, tomcats, black and red coated (Highlander, Lowlander, Britannica) sitting on large log, with autumn foliage - Petra Wegner
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Petra Wegner / British Longhair Cats, tomcats, black and red coated (Highlander, Lowlander, Britannica) sitting on large log, with autumn foliage
Group portrait of five dogs sitting, from left to rt: two mongrels, Rough Collie, Bobtail (Old English Sheepdog) and longhaired Chihuahua. - Petra Wegner
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Petra Wegner / Group portrait of five dogs sitting, from left to rt: two mongrels, Rough Collie, Bobtail (Old English Sheepdog) and longhaired Chihuahua.
Group portrait of five dogs sitting, from left to rt: two mongrels, Rough Collie, Bobtail (Old English Sheepdog) and longhaired Chihuahua. - Petra Wegner
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Petra Wegner / Group portrait of five dogs sitting, from left to rt: two mongrels, Rough Collie, Bobtail (Old English Sheepdog) and longhaired Chihuahua.
Red-footed Falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary - Wild Wonders of Europe / Varesvuo
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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
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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
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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
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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
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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
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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
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Wild Wonders of Europe / Varesvuo / Red-footed falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary, May 2008
Cavalier King Charles Spaniel, ruby, black-and-tan, tricolour and blenheim, sitting in line on beach, panting - Petra Wegner
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Petra Wegner / Cavalier King Charles Spaniel, ruby, black-and-tan, tricolour and blenheim, sitting in line on beach, panting
Lion-maned Dwarf Domestic Rabbits, 13 weeks, Dwarf Rabbit, and Satin Lop-eared Dwarf Rabbit, 8 weeks - Petra Wegner
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Petra Wegner / Lion-maned Dwarf Domestic Rabbits, 13 weeks, Dwarf Rabbit, and Satin Lop-eared Dwarf Rabbit, 8 weeks
Bluebells (Hyacinthoides non-scripta) white morph amongst blue flowers, Belgium - Philippe Clement
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Philippe Clement / Bluebells (Hyacinthoides non-scripta) white morph amongst blue flowers, Belgium
Bluebells (Hyacinthoides non-scripta); white form next to normal blue form, North Somerset, UK - Michael Hutchinson
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Michael Hutchinson / Bluebells (Hyacinthoides non-scripta); white form next to normal blue form, North Somerset, UK
Fur Seal pair mating (Arctocephalus pusillus pusillus) Cape Cross Seal Reserve, Namibia - Anup Shah
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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
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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
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Anup Shah / Fur Seal pair mating (Arctocephalus pusillus pusillus) Cape Cross Seal Reserve, Namibia
Domestic cat (Felis catus) 8-week-old kittens - Jane Burton
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Jane Burton / Domestic cat (Felis catus) 8-week-old kittens
Peppered moth {Biston betularia} normal and melanic forms on birch trunk. UK. - Kim Taylor
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Kim Taylor / Peppered moth {Biston betularia} normal and melanic forms on birch trunk. UK.
South American / Patagonian sealion pair mating {Otaria flavescens} Valdez peninsula, Argentina. Note large difference in size between male and female - Gabriel Rojo
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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
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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
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Gabriel Rojo / South American / Patagonian sealion pair {Otaria flavescens} Valdez peninsula, Argentina
Fox squirrel, black form {Sciurus niger} Texas, USA. - Rolf Nussbaumer
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Rolf Nussbaumer / Fox squirrel, black form {Sciurus niger} Texas, USA.
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