Martin Gabriel / Woodcock murex snail (Murex scolopax), its aperture locked with operculum, Gulf of Oman, Sultanate of Oman, January, CROPPED
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Alex Hyde / Glengorm stone circle at twilight, Isle of Mull, Scotland, UK. June 2015
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Chris Mattison / Tan and white cowrie (Cribrarula cribraria) shell, showing aperture, on white background.
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Olga Kamenskaya / Hole in ice used by Baikal seals (Pusa sibirica) for breathing. Lake Baikal, Russia, April.
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Olga Kamenskaya / People looking at hole in ice used by Baikal seals (Pusa sibirica) for breathing. Lake Baikal, Russia, April 2009.
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Olga Kamenskaya / Hole in ice used by Baikal seals (Pusa sibirica) for breathing. Lake Baikal, Russia, April.
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Olga Kamenskaya / Holes in ice used by Baikal seals (Pusa sibirica). Lake Baikal, Russia, April 2009.
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Olga Kamenskaya / Man visible on surface of the ice through dive hole. Lake Baikal, Russia. March 2008.
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Pal Hermansen / View to wintry landscape through hole in ice, Hornsund, Svalbard, Norway, September.
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Nick Garbutt / Hole chewed in tree trunk by a feeding Aye-aye (Daubentonia madagascariensis) excavating for beetle grubs. In forests near Andranotsimaty, Daraina, northern Madagascar.
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Nick Garbutt / Holes chewed in tree trunk by a feeding Aye-aye (Daubentonia madagascariensis) excavating for beetle grubs. In the forests near Andranotsimaty, Daraina, northern Madagascar. Endangered species.
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Loic Poidevin / Black woodpecker (Dryocopus martius ) at nest hole, with chicks begging for food, Indre-et-Loire, France, June.
