Eric Baccega / Black flat-coated retriever dog splashing in water and retrieving stick (Canis familiaris)

Bryan and Cherry Alexander / Nivkhi fisherman retrieving Chum salmon (Oncorhynchus keta) from net at sunset. Niva Bay, Sakhalin Island, Russian Far East, 2006.

LYNN M. STONE / Domestic dog, German short-haired pointer retrieving a dead male Ring-necked pheasant, Connecticut, USA

Petra Wegner / Cavalier King Charles Spaniel, blenheim, retrieving ball, running on beach

Juergen Freund / Hunting-dog (spaniel?) retrieving shot bird from water, split level, Lake San Pietro de Bevagna, Italy

Mark Raycroft / Golden Retriever (Canis familiaris) adult female dog with retrieving toy in mouth

Doug Gimesy / Platypus researcher retrieving a platypus (Ornithorhynchus anatinus) from a net that was set up just 1 hour earlier to capture and help monitor the local population. Chum Creek, Healsville, Victoria,...

Doug Gimesy / Platypus researchers retrieving a platypus (Ornithorhynchus anatinus) from a Fyke net that was set up to capture them as part of a Melbourne Water study to monitor the local population. Worri Yallock...

Doug Gimesy / Platypus researcher retrieving a Platypus (Ornithorhynchus anatinus) from a Fyke net that was set up to capture and help monitor the local population. McMahons Creek, Yarra Ranges, Victoria, Australia...

Doug Gimesy / Platypus researchers retrieving a Platypus (Ornithorhynchus anatinus) from a Fyke net that was set up to capture them as part of a Melbourne Water study to monitor the local population. Once retrieved...

Doug Gimesy / Earthcare St Kilda penguin research volunteer holding Little penguin (Eudyptula minor) after retrieving it from burrow to check for microchip and determine sex and weight. St Kilda breakwater, Melbour...

Dave Bevan / Eurasian jay (Garrulus glandarius) retrieving acorns from a cache in a rotting gatepost, Carmarthenshire, Wales, UK, November.