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.

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

Mark Raycroft / Whippet (Canis familiaris) puppy running with leaf

Mark Raycroft / Papillon (Canis familiaris) puppy playing

Mark Raycroft / Chesapeake Bay Retriever (Canis familiaris) puppy playing with a stick

Mark Raycroft / Chesapeake Bay Retriever (Canis familiaris) puppy playing

Matthew Maran / Black and white border collie with stick, Hampstead Heath, England, UK, March.

Nick Upton / Wiltshire Bat Group member retrieving a bat from the collecting trough of a harp trap set inside Box mine during an autumn swarming survey run by Wiltshire Bat Group, Box, Wiltshire, UK, September. Mo...

Neil Aldridge / Spaniel gundog holding a dead female Ring-necked pheasant (Phasianus colchicus) in its mouth during a winter shoot on shooting estate, southern England, UK. January.

Neil Aldridge / Spaniel gundog hauling itself out of a lake carrying a dead female Ring-necked pheasant (Phasianus colchicus) shot during a winter country shoot on shooting estate, southern England, UK. January.

Neil Aldridge / Wet labrador gundog emerging from lake with a male Ring-necked pheasant (Phasianus colchicus) in its mouth during a winter shoot on shooting estate, southern England, UK. January.

Philip Stephen / Fishing vessel 'Ocean Harvest' retrieving net while fishing on the North Sea, February 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Fishing vessel 'Ocean Harvest' retrieving net, surrounded by Gannets (Morus bassanus) and a variety of gulls, while fishing on the North Sea, February 2014. All non-editorial uses must be cleared indi...

LYNN M. STONE / Labrador Retriever retrieving toy from sea, Guilford, Connecticut, USA

Ernie Janes / Yellow Labrador playing on a Norfolk beach, retrieving ball from sea, East Anglia, England, UK, December.

Ernie Janes / Yellow Labrador playing on a Norfolk beach, retrieving ball from sea, East Anglia, England, UK, December.

Petra Wegner / Cavalier King Charles Spaniel tricolour male, age 3, retrieving ball from sea, Texel, Netherlands.

Petra Wegner / Cavalier King Charles Spaniel tricolour male, age 3, retrieving ball from sea, Texel, Netherlands.

Petra Wegner / Cavalier King Charles Spaniel tricolour male, age 3, retrieving ball from sea, Texel, Netherlands.

Fiona Rogers / Stulmann's blue monkey (Cercopithecus mitis stuhlmanni) female 'Camille' retrieving food from her cheek pouches which are exceptionally large. Kakamega Forest South, Western Province, Kenya.

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

Mark Raycroft / German Shepherd (Canis familiaris) puppy running with a stick

Mark Raycroft / English Bulldog (Canis familiaris) carrying a container

Mark Raycroft / Border Collie (Canis familiaris) catching a frisbee

Ernie Janes / Cocker spaniel retrieving a shot Common pheasant (Phasianus colchicus), Norfolk, England, UK, December.

Ernie Janes / Cocker spaniel retrieving a shot Red-legged partridge (Alectoris rufa), Norfolk, England, UK, December.

Ernie Janes / Yellow labrador retrieving a shot Common pheasant (Phasianus colchicus), Norfolk, England, UK, December.

Sebastian Kennerknecht / Ridley's Bat (Myotis ridleyi) biologist Tim Salzman retrieving bat from mist net for metabolic analysis research, Tawau Hills Park, Sabah, Borneo, Malaysia

Ernie Janes / Yellow Labrador retrieving cock pheasant (Phasianus colchicus), during pheasant shoot Essex, November

Ernie Janes / Springer Spaniel retrieving shot common pheasant (Phasianus colchicus) during pheasant shooting in stubble field, Essex, November

Ernie Janes / Black Labrador retrieving dead cock pheasant (Phasianus colchicus) during pheasant shooting, Essex, November

Ernie Janes / Springer Spaniel retrieving shot Common Pheasant (Phasianus colchicus) in stubble field, Essex, November

Ernie Janes / Cocker Spaniel retrieving cock pheasants (Phasianus colchicus) during pheasant shooting, in drilled barley field, Essex, November

Christophe Courteau / Common limpet homing (retrieving site on rock at high tide) Brittany France {Patella

Ernie Janes / Cocker spaniel dog retrieving Red legged partridge (Alectoris rufa) on shoot, UK, October.

Ernie Janes / Cocker spaniel dog retrieving Red legged partridge (Alectoris rufa) on shoot, UK, October.

Ernie Janes / Black labrador dog (Canis familiaris) retrieving cock pheasant on shoot, UK, October.

Ernie Janes / Cocker spaniels and Labrador (Canis familiaris) retrieving on pheasant shoot with owner, Norfolk, UK

Ernie Janes / Yellow Labrador on lead retrieving on pheasant shoot, UK

Ernie Janes / Cocker spaniel dog retrieving partridges on shoot, UK

Ernie Janes / Cocker spaniel dog retrieving partridges on shoot, UK

Ernie Janes / Black Labrador dog (Canis familiaris) retrieving cock pheasant on shoot, UK

Ernie Janes / Cocker spaniel dog retrieving partridges on shoot, UK

Ernie Janes / Cocker spaniel dog ) retrieving partridges on shoot, UK

Philip Stephen / Peterhead registered fishing trawler "Harvester" retrieving her net on the North Sea, June 2009. Property Released.

Florian Möllers / Weimaraner retrieving a shot Great Cormorant (Phalacrocorax carbo sinensis). Bohmte, Germany, August 2009.

Florian Möllers / Fisherman holding Great Cormorant (Phalacrocorax carbo sinensis) retrieving a large fish from its throat. Li River, Yangshuo, Guangxi, China.

Florian Möllers / Fisherman holding Great Cormorant (Phalacrocorax carbo sinensis) retrieving a large fish from its throat. Li River, Yangshuo, Guangxi, China.

Florian Möllers / Two Weimaraner dogs retrieving a shot Great Cormorant (Phalacrocorax carbo sinensis). Bohmte, Germany, August 2009.

Peter Cairns / 2020VISION / Dog playing in water whilst people wait on Chanonry Point beach hoping to see dolphins, Fortrose, Moray Firth, Lothian, Scotland, UK, August 2010

Ernie Janes / Yellow Labrador retriever fetching ball from sea water, Norfolk, UK, March

Ernie Janes / Jack Russell Terrier retrieving stick from water, UK

Bryan and Cherry Alexander / Inuit hunter retrieving dead seal from lead. Northwest Greenland, 1980.

Petra Wegner / Mixed Breed Dog in field, running towards camera, retrieving toy rope.

Petra Wegner / Mixed Breed Dog running towards camera, retrieving toy rope.

Petra Wegner / Rough Collie, running towards camera, retrieving foodbag.

Petra Wegner / Mixed breed dog running towards camera, retrieving foodbag.

Petra Wegner / Small Munsterlander with dummy, retrieving / training with owner.

Petra Wegner / Small Munsterlander with dummy, retrieving / training with owner.

Petra Wegner / Kromfohrlander playing with / retrieving ball / toy, in a field.

Bryan and Cherry Alexander / Inuit man retrieving American lake trout (Salvelinus namaycush) from his net set under the ice at Baker Lake. Nunavut, Canada, 1982.

David Woodfall / Putcher fisherman retrieving a Trigger fish (Balistes capriscus) from putcher baskets on Severn estuary. This catch is indicative of climate change and warming seas. This traditional way of fishing is...

David Woodfall / Putcher fisherman retrieving a Trigger fish (Balistes capriscus) from putcher baskets on Severn estuary. This catch is indicative of climate change and of warming seas. This traditional way of fishing...

Philip Stephen / Trawler "Ocean Harvest" retrieving her trawl net amid seabirds. North Sea, June 2010. Property released.

LYNN M. STONE / Yellow Labrador Retriever standing in spartina salt marsh grass at low tide, Rhode Island, USA

LYNN M. STONE / Black Labrador Retriever on retrieve, running through shallows of pond in salt marsh, Rhode Island, USA

LYNN M. STONE / Portrait of chocolate Labrador Retriever with retrieved Mallard duck, standing at edge of pond, Madison, Wisconsin, USA

LYNN M. STONE / Chocolate Labrador Retriever standing at edge of pond, Wisconsin, USA

LYNN M. STONE / Chocolate Labrador Retriever on retreive, running / splashing into pond, Wisconsin, USA

LYNN M. STONE / Chocolate Labrador Retriever on retreive, swimming, Madison, Wisconsin, USA

LYNN M. STONE / Liver coloured German Shorthair Pointer with smooth coat, standing by edge of pond Putnam, Connecticut, USA

LYNN M. STONE / English Setter standing at edge of pond, Putnam, Connecticut, USA

LYNN M. STONE / Portrait of yellow Labrador Retriever with retrieved Mallard duck, sitting in salt marsh grass at low tide, Charlestown, Rhode Island, USA

LYNN M. STONE / Portrait of yellow Labrador Retriever with female Mallard duck, sitting in salt marsh grass at low tide, Rhode Island, USA

LYNN M. STONE / Male Golden Retriever standing in stream on retrieve, Illinois, USA

LYNN M. STONE / Female Golden Retrieverswimming across stream on retrieve, Illinois, USA

LYNN M. STONE / Golden Retriever lunging into pond to begin retrieve, Woodstock, Illinois, USA

LYNN M. STONE / Head portrait of Golden Retriever swimming, retrieving training bumper, Illinois, USA

LYNN M. STONE / Male Golden Retriever running towards water, retrieving, Illinois, USA

LYNN M. STONE / Young Golden Retriever swimming with training bumper, Connecticut, USA

LYNN M. STONE / Light-coloured Golden Retriever standing in pond, with water lilies, Connecticut, USA

LYNN M. STONE / Portrait of black flat-coated Retriever in pond with white water-lilies, Connecticut, USA

LYNN M. STONE / Portrait of black flat-coated Retriever in pond with white water-lilies, Connecticut, USA

LYNN M. STONE / Yellow Labrador Retriever plunging into stream to retrieve orange training bumper, Illinois, USA

LYNN M. STONE / Yellow Labrador Retriever plunging into stream to start retrieving, Illinois, USA