David Pattyn / Great crested grebe (Podiceps cristatus) adults courting and greeting each other to confirm their bond. Even with the young chicks already out they often show courtship behavior to each other, Valkenh...
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Stefan Christmann / Emperor penguin (Aptenodytes forsteri), two adults with chicks aged six to eight weeks. Atka Bay, Antarctica. September.
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Donald M. Jones / Black-tailed Prairie Dog (Cynomys ludovicianus) pair greeting, South Dakota
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Donald M. Jones / Black-tailed Prairie Dog (Cynomys ludovicianus) pair greeting, South Dakota
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George Sanker / Mallard (Anas platyrhynchos) pair greeting on snow-covered pond. Acadia National Park, Maine, USA.
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George Sanker / Mallard (Anas platyrhynchos)pair greeting on snow-covered pond. Acadia National Park, Maine, USA.
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Francisco Marquez / Pair of Iberian lynxes (Lynx pardinus) greeting, Andalusia, Spain, January.
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Edwin Giesbers / RF - European ground squirrels / Sousliks (Spermophilus citellus)greeting, Gerasdorf, Austria. April. (This image may be licensed either as rights managed or royalty free.)
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Eric Baccega / Pack of Grey wolves (Canis lupus) greeting one another and expressing submissive behaviour,captive, Bavarian Forest National Park, Germany, July. Captive.
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Mark Taylor / Yellow Labrador Retriever puppy, 8 weeks old, sitting with raised paw
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Richard Du Toit / African Lion (Panthera leo) males greeting, Kgalagadi Transfrontier Park, South Africa
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Ben Hall / Greenfinch (Carduelis chloris) pair, one perched on branch and one hovering in snowfall, Derbyshire, February.