Marie Read / Black-necked stilts (Himantopus mexicanus) pair performing post-copulatory display (as copulation ends, the male slides off the female leaving his wings draped over her and crossing his bill with hers...
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Miles Barton / Panamanian golden frog (Atelopus ziteki) reacting to the image of a frog on a video monitor. Experiment carried out to reveal the purpose of the frog's waving behaviour - to attract mates and deter ri...
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Solvin Zankl / Mating swarm of Long-tailed / Tisza mayflies (Palingenia longicauda) Tisza river, Hungary, Every female is approached by several mature males. Eventually the female mates with one of them on the water...
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Solvin Zankl / Mating swarm of Long-tailed / Tisza mayfly(Palingenia longicauda) Every female is approached by several mature males. Eventually the female mates with one of them on the water surface. June 2008
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Solvin Zankl / Female Long-tailed / Tisza mayfly (Palingani a longicauda) rise up in the air soon after mating, where they form huge swarms and are out of range from males still searching for mates close to the wate...
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Solvin Zankl / Female Long-tailed / Tisza mayfly (Palingani a longicauda) rise up in the air soon after mating, where they form huge swarms and are out of range from males still searching for mates close to the wate...
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Stefan Christmann / Emperor penguin (Aptenodytes forsteri), three in fight over mates at start of breeding season. Atka Bay, Antarctica. May.
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Alex Mustard / Day octopus (Octopus cyanea) darker male reaching over and mates with a lighter female on the wreck of a barge. Gubal Island, Egypt. Strait of Gubal, Gulf of Suez, Red Sea.
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Nick Upton / Male Yellow dung flies (Scathophaga stercoraria) competing for mates on sheep dung, trying to knock and wrestle other males off the backs of the females they are guarding, Wiltshire, England, UK, Marc...
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Nick Upton / Male Yellow dung flies (Scathophaga stercoraria) competing for mates on sheep dung, trying to knock and wrestle other males off the backs of the females they are guarding, Wiltshire, England, UK, Marc...
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Nick Upton / Male Yellow dung flies (Scathophaga stercoraria) competing for mates on sheep dung, trying to knock and wrestle other males off the backs of the females they are guarding, Wiltshire, England, UK, Marc...
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Alex Mustard / Spinner dolphins (Stenella longirostris) female mates with a male below, while another male accompanies. The two males were taking it in turn to mate with her. Sataya Reef, Fury Shoal, Egypt. Red Sea
