John Chan / California brown pelicans (Pelecanus occidentalis californicus) roosting on a mudflat, with a flock of Elegant terns (Thalasseus elegans) nearby, Southern California, USA May/2019
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John Shaw / Brown bear (Ursus arctos) searching for clams on tidal mudflat with waterbirds. Lake Clark National Park, Alaska. August.
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John Chan / Western gull (Larus occidentalis) feeding on a California two-spot octopus (Octopus bimaculoides) on a mudflat at low tide, Southern California, USA, November.
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SCOTLAND: The Big Picture / Panning shot of a large flock of Pink-footed geese (Anser brachyrhynchus) taking off from their roosting site, Montrose, Angus, Scotland, UK, November.
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Terry Whittaker / 2020VISION / Common / Harbour seals (Phoca vitulina) hauled out on mudflats at saltmarsh, Wallasea Island RSPB reserve, Essex, UK, March 2011
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Anup Shah / Troop of Proboscis Monkeys (Nasalis larvatus) walking on their hindlegs through the mudflats revealed at low tide. Bako National Park, Sarawak, Borneo, Malaysia, March 2010.
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Laurie Campbell / Bar-tailed godwit (Limosa lapponica) feeding on tidal mudflat, Firth of Forth, Scotland, UK, February
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Hanne & Jens Eriksen / Crab-plover (Dromas ardeola) three walking in a row on mudflat, two with food in beaks. Oman, June.
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Nigel Cattlin / Mudflats of Chichester Channel at low tide, at sunset. Itchenor, West Sussex. November 2016.
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Mike Read / Ruff (Philomachus pugnax) feeding in mudflat at edge of lagoon. Titchwell Marsh RSPB Reserve, Norfolk, England, UK. September.
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Mike Read / Red knot (Calidris canutus) flock in flight over mudflats at sunset. Snettisham RSPB Reserve, The Wash, Norfolk, England, UK. August 2018.