Nature Picture Library offers the best nature photographs and footage from the world's finest photographers, to license for commercial and creative use. More than 700,000 images and video clips online, from tigers to turtles and elephants to sharks.
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Brian Bevan / Grass snake (Natrix natrix) at pond edge sensing with tongue, Bedfordshire, UK, September.
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Brian Bevan / Grass snake (Natrix natrix) sensing with tongue while swimming through duckweed in pond, Bedfordshire, UK, September.
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Colin Varndell / Grass snake (Natrix natrix) Dorset, UK May
