David Woodfall / Lesser horseshoe bats (Rhinolophus hipposideros) in magnesium mine, Shropshire, England, UK, April.
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Huw Cordey / Mexican free-tailed bats (Tadarida brasiliensis) emerging from Bracken Cave, Texas. Over 15 million bats are thought to live in this cave, making it the greatest concentration of mammals on the planet...
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Nick Hawkins / Common vampire bat (Desmodus rotundus) exiting cave, Costa Rica, March 2014.
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Nick Hawkins / Common vampire bats (Desmodus rotundus) roosting in cave, Costa Rica.
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Alex Hyde / Lesser horseshoe bat (Rhinolophus hipposideros) roosting in cave. Croatia. November.
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Alex Hyde / Greater horseshoe bat (Rhinolophus ferrumequinum) roosting in cave. Croatia. November.
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Inaki Relanzon / Lesser Horseshoe Bat (Rinolophus hipposideros) hibernating in Forat de l'Or cave in Terradets Canyon, Pyrenees, Lleida, Catalonia, Spain, December
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Paul Harcourt Davies,Paul Harcourt Davies / Lesser Horseshoe Bat (Rhinolophus hipposideros) hibernating in an Etruscan tomb, Podere Montecucco, near Orvieto, Umbria, Italy, November
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Jabruson / Sundevall's Leaf-nosed Bats (Hipposideros caffer) in flight in forest roosting cave. Bai Hokou, Dzanga-Ndoki National Park, Central African Republic.
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Solvin Zankl / Schreiber's long fingered bat (Miniopterus schreibersi) in flight in cave, Grotta Monte Majore, Sardinia, Italy. Highly commended, Mammals category, GDT 2012 competition.
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Eric Medard / Lesser Mouse Eared Bat (Myotis blythii) in flight in cave. France, Europe, August.
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Eric Medard / Mediterranean Horseshoe Bat (Rhinolophus euryale) in flight in cave. France, Europe, August.
