Pascal Tordeux / Lone tree in a barley field. Picardy, France.
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Jeff Rotman / Close-up of gills of Lemon shark (Negaprion brevirostris)
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David Tipling / Pied wagtails (Motacilla alba yarrellii) silhouetted against the moon, roosting in tree in shopping centre. Kent, UK, December
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Alex Mustard / Bottlenose dolphin (Tursiops truncatus) with surface reflection, in shallow water over a sand bank. Sandy Ridge, Little Bahama Bank, Bahamas. Tropical West Atlantic
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Claudio Contreras / Pink abalone (Haliotis corrugata) shell detail, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, January
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Adrian Davies / Two Oleander Hawkmoths (Daphnis nerii) at rest on leaves.
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Mary McDonald / Flock of Cattle Egrets (Bubulcus ibis) in roosting trees at dusk, Imba Ndutu, Serengeti NP, Tanzania, East Africa.
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Neil Lucas / Dragons blood tree (Dracena cinnibaris) reflected, Socotra, Yemen, February 2007. Digitally created image
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Richard Du Toit / Impala lily flower (Adenium multiflorum) Sabi Sand GR, South Africa, October
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Uri Golman / Sunset over iceberg. Jakobshavn, Ilulissat, Kangia, Icefjord, Greenland. August 2006.
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Ross Hoddinott / RF - Groyne at Dawlish Warren, Devon, UK. January 2016. (This image may be licensed either as rights managed or royalty free.)
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Niall Benvie / RF - Rowan (Sorbus aucuparia) with torch light, Mull, Scotland. (This image may be licensed either as rights managed or royalty free.)