Sam Hobson / Scientists collecting samples, including cloaca swabs, from urban goshawks (Accipiter gentilis). Berlin, Germany. May 2014. Nominated in the Melvita Nature Images Awards competition 2014.
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Claudio Contreras / Gentoo penguin (Pygoscelis papua) pair mating, Sea Lion Island, Falkland Islands, October
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Paul Bertner / Spiked Spider (Gasteracantha sp), Angkor Wat, Cambodia
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Bruno D'Amicis / Silvery-cheeked hornbill (Bycanistes brevis) male perched, Jimba, Lake Tana Biosphere Reserve, Ethiopia.
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Dave Watts / Platypus (Ornithorhynchus anatinus) spurs and cloaca, from dead specimen, Tasmania, Australia
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Theo Webb / Male Indian peafowl (Pavo cristatus) displaying to attract a female, rear view, Bandhavgarh National Park, India.
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Sam Hobson / Scientists collecting samples, including cloaca swabs, from urban goshawks (Accipiter gentilis). Berlin, Germany. May 2014.
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Sam Hobson / Scientists collecting samples, including cloaca swabs, from urban goshawks (Accipiter gentilis). Berlin, Germany. May 2014.
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Will Watson / Female Great diving beetle (Dytiscus circumflexus) view of underside with cloacal sperm plug from previous mating, UK, captive.
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Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) underside showing cloaca and mammary glands, Tasmania, captive.
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Ingo Arndt / Olive Ridley Sea Turtle (Lepidochelys olivacea) female laying eggs, Ostional Beach, Costa Rica
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Pete Oxford / Eastern diamondback rattlesnake (Crotalus adamanteus) close up of cloaca, belly and tail scales, captive
