Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) sub-adult female 'Mosoko' aged 8 years crossing a river, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic
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Marie Read / Wood Ducks (Aix sponsa), females behave aggressively toward a male (second from right) that is trying to join them on a floating log, autumn, New York, USA, October.
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John Waters / Male Shoveler (Anas clypeata) chasing other males away from his mate, Greyale RSPB Reserve, Somerset Levels, England, UK, February.
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Dave Bevan / Female Giant wood wasp (Uroceras gigas) inserting ovipositor into tree stump to lay eggs, Carmarthenshire, Wales, UK, September.
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Dave Bevan / Two male Grey seals (Halichoerus grypus) fighting in surf, with a female and juvenile nearby, Norfolk, England, UK. December.
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Christophe Courteau / Female Mountain gorilla (Gorilla beringei beringei) playing with baby, Volcanoes National Park, Rwanda.
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Dave Bevan / Female Blackbird (Turdus merula) feeding chicks at nest, removing faecal sacs, Carmarthenshire, Wales, UK, June.
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Nick Upton / Female Eurasian beaver (Castor fiber) and five kits feeding on a Willow (Salix) sapling, River Otter, Devon, England, UK, July. Part of Devon Wildlife Trust's Devon Beaver Trial.
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Peter Bassett / Male Southern elephant seal (Mirounga leonina) shifting position on a beach, surrounded by females, almost crushing a pup, Gold Harbour, South Georgia.Gold Harbour, South Georgia.
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Dave Watts / Female Western grey kangaroo (Macropus fuliginosus) rolling with a large joey in her pouch, Kangaroo Island, South Australia.
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Dave Watts / Female Tamar wallaby (Macropus eugenii) grazing with a joey in her pouch, Kangaroo Island, South Australia.
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Dave Watts / Two female Australian sea lions (Neophoca cinerea) playing and interacting on a beach, with others nearby, Seal Bay Conservation Area, Kangaroo Island, South Australia.