Grzegorz Lesniewski / Portrait of a European Hamster (Cricetus cricetus). Lublin Highland, Poland, June.

Erlend Haarberg / Norway lemming (Lemmus lemmus) jumping aggressively, during the lemming population explosion, Vauldalen, Norway, May, 2011.

Andy Rouse / Red squirrel (Sciurus vulgaris) reaching upwards, UK. Captive.

Ann & Steve Toon / Young Ground squirrels (Xerus inauris) at burrow, Kgalagadi Transfrontier Park, South Africa. Non-ex.

Axel Gomille / Indian Giant / Giant Malabar Squirrel (Ratufa indica) on a branch. Karnataka, India.

Rod Williams / Patagonian Cavy / Mara (Dolichotis patagonum) portrait. Captive. Endemic to southern South America.

Will Burrard-Lucas / Big-headed mole rat (Tachyoryctes macrocephalus) appearing from its hole, Bale Mountains National Park, Ethiopia. Taken with remote camera.

Peter Cairns / Red Squirrel (Sciurus vulgaris) in flowering heather. Inshriach Forest, Scotland, UK, September. 2020VISION Book Plate. Did you know? For every Red Squirrel in Britain there are around 18 Grey Squirre...

Nick Garbutt / Female Capybara (Hydrochoerus hydrochaeris) swimming in line with young after escaping a Jaguar attack (Panthera onca palustris) in a lagoon off the Paraguay River. Taiama Ecological Reserve, Pantanal...

John Cancalosi / Golden-mantled ground squirrel (Spermophilus lateralis) with very full cheek pouches. Montana, USA, Oct 2010

Jussi Murtosaari / Siberian flying squirrel (Pteromys volans) eating leaves, Finland, May

Nick Upton / Two young Common / Hazel dormice (Muscardinus avellanarius), captured during a survey in coppiced woodland near Bristol, being held temporarily in a plastic sack, Somerset, UK, October. Non-ex. Winner...

Wild Wonders of Europe / Zankl / Beaver (Castor fiber) feeding at edge of water, Peene river, Anklam, Germany, June.

Fergus Gill / 2020VISION / Grey Squirrel (Sciurus carolinensis) in urban park in winter. Glasgow, Scotland, December. Did you know? Scientists believe that some of the UK's native Red Squirrels are gaining immunity to the pox i...

Klaus Echle / Edible dormouse (Glis glis) in tree hole, Black Forest, Baden-Wurttemberg, Germany. July.

Bernard Castelein / Malayan Giant Squirrel (Ratufa bicolor) with twig. Panbari Forest, Assam, India.

Pete Oxford / Cuban or Desmarest's Hutia (Capromys pilorides)~Jardines de la Reina National Park, endemic to Cuba, Caribbean

Nick Upton / Close up of an adult Edible / Fat Dormouse (Glis glis) held in a leather glove during a monitoring project in woodland where this European species has become naturalised, Buckinghamshire, UK, August,...

Pete Oxford / Cuban or Desmarest's Hutia (Capromys pilorides)~Jardines de la Reina National Park, endemic to Cuba, Caribbean

John Cancalosi / Coypu / Nutria {Myocastor coypus} introduced from South America to Louisiana, USA

Wild Wonders of Europe / López / Spotted souslik (Spermophilus suslicus) standing alert on hind legs, Werbkowice, Zamosc, Poland, May 2009

Solvin Zankl / Norway lemming head portrait {Lemmus lemmus} Norway

Solvin Zankl / Norway lemming close up of paw {Lemmus lemmus} Norway

Ben Cranke / Capybara (Hydrochoerus hydrochaeris) walking along the river bank, Mato Grosso, Pantanal, Brazil. August.

Roland Seitre / Central American Agouti (Dasyprocta punctata) mother resting with young. La Marina Wildlife Rescue Center, Costa Rica.

Suzi Eszterhas / Agouti (Dasyprocta punctata) feeding on fruit, Osa Peninsula, Costa Rica

Roland Seitre / Close up of Pacarana (Dinomys branckii) teeth, showing typical rodent morphology. Member of a breeding project. Captive. Biopark reserve, Cota, Bogota, Colombia, January 2010.

Tony Heald / Porcupine at water {Hystrix africaeaustralis} Damaraland, Namibia

Stephen Dalton / Northern Flying squirrel (Glaucomys sabrinus) gliding (Native to North America) controlled conditions

Will Burrard-Lucas / Red and White Giant Flying Squirrel (Petaurista alborufus) gliding, Foping Nature Reserve, Qinling Mountains, Shaanxi province, China.

Rolf Nussbaumer / Central American Agouti {Dasyprocta punctata} Bosque de Paz, Central Valley, Costa Rica

Jane Burton / Agouti Mongolian Gerbil (Meriones unguiculatus) mother with baby, against white background

Ben Lascelles / Coiban Agouti (Dasyprocta coibae) eating, Coiba Island National Park, Panama, September, Vulnerable species

Dave Watts / Coypu (Myocastor coypus) view of back and tail, France

Dave Watts / Coypu (Myocastor coypus) France

John Cancalosi / Central American Agouti (Dasyprocta punctata) portrait, standing holding food. Costa Rican tropical rainforest.

John Cancalosi / Central American Agouti (Dasyprocta punctata) in profile. Costa Rican tropical rainforest.

Konstantin Mikhailov / Alpine marmot (Marmota marmota) standing on hind legs calling, Hohe Tauern National Park, Austrian Alps, Austria, May

Roland Seitre / Pacarana (Dinomys branckii) portrait, member of a breeding project. Captive. Biopark reserve, Cota, Bogota, Colombia, January 2010.

George Sanker / Yellow-bellied Marmot (Marmota flaviventris) basking on a rock in the sun. Yellowstone National Park, Wyoming, USA, June.

Kerstin Hinze / Fat / Edible dormouse (Glis glis) feeding on leaves at night, Germany, captive

B&S Draker / Mexican Ground Squirrel (Spermophilus mexicanus) adult drinking. Sinton, Corpus Christi, Coastal Bend, Texas, USA, May.

Neil Bromhall / Naked mole rat in tunnel {Heterocephalus glaber} Kenya, East Africa

George Sanker / Yellow-bellied Marmots (Marmota flaviventris) mating. Yellowstone National Park, Wyoming, USA, June.

Roland Seitre / Pacarana (Dinomys branckii) portrait, member of a breeding project. Captive. Biopark reserve, Cota, Bogota, Colombia, January 2010.

Steven Kazlowski / North American porcupine (Erethizon dorsatum) pup feeds on Alaskan high brush cranberries in the foothills of the Takshanuk Mountains, South-East Alaska, USA

Eric Baccega / Common hamster (Cricetus cricetus) standing, Alsace, France, captive

Jussi Murtosaari / Siberian flying squirrel (Pteromys volans) emerging from hole in tree, Finland, May

Shattil & Rozinski / Paca {Agouti paca} Belize

Charlie Summers / Black-tailed prairie dogs (Cynomys ludovicianus) yipping atop burrow, Wind Cave National Park, South Dakota, USA, September.

Orsolya Haarberg / Eurasian beaver (Castor fiber) feeding on willow leaves in water, Telemark, Norway, June

Marie Read / Black-tailed Prairie Dog (Cynomys ludovicianus), young animal feeding amid a carpet of yellow sneezeweed flowers, Wichita Mountains National Wildlife Refuge, Oklahoma, USA

Thomas Lazar / Black tailed prairie dog (Cynomys ludovicianus) alert female, Custer State Park, South Dakota, USA

Roland Seitre / Kultarr (Antechinomys laniger) captive at Desert Park, Alice Springs, Northern Territory, Australia. Endemic.

Konstantin Mikhailov / Tracks of desert Jerboa in sand, Gobi desert, Mongolia

Roland Seitre / Long-eared Jerboa (Euchoreutes naso). Captive. Endemic to Mongolia and northern China. Endangered.

Klaus Echle / Edible dormouse (Glis glis) on beech branch, Black Forest, Baden-Wurttemberg, Germany. May.

Peter Blackwell / Crested porcupine {Hystrix cristata} foraging on ground, Central Kenya, Africa

Michael Pitts / Common short tailed porcupine at waters edge {Hystrix brachyura} Flores Indonesia

Konrad Wothe / Libyan jird (Meriones lybicus) next to vehicle tyre, Libya, Sahara, North Africa, December

John Cancalosi / Muskrat (Ondatra zibethicus) feeding, New York, USA, October.

Jussi Murtosaari / Muskrat (Ondatra zibethicus) Espoo, Uusimaa, Finland, May. Introduced species.

Eric Baccega / Muskrat (Ondatra zibethicus) walking on snow, Quebac, Canada

Jane Burton / Golden hampster {Mesocricetus auratus} 3 day old infant suckling. Captive. UK.

Eric Baccega / Common hamster (Cricetus cricetus) in its burrow, Alsace, France, April, captive

Eric Baccega / Portrait of a common hamster (Cricetus cricetus) Alsace, France, April, captive

Yukihiro Fukuda / Japanese squirrel (Sciurus lis) feeding on walnut in autumn leaves , Mount Yatsugatake, Nagano Prefecture, Japan, November. Endemic species.

Grzegorz Lesniewski / Portrait of a European Hamster (Cricetus cricetus). Lublin Highland, Poland, June.

Sam Hobson / Barbary ground squirrel (Atlantoxerus getulus) outside beach-side resort. Fuerteventura, Canary Islands, Spain. April.

Gabriel Rojo / Cattle tyrant (Machetornis rixosus) perched on capibara (Hydrochoerus hydrochaeris) Ibera Marshes, Corrientes Province, Argentina

Gabriel Rojo / Patagonian mara / cavy (Dolichotis patagonum) suckling young. Valdes Peninsula, Chubut, Patagonia, Argentina.

Terry Whittaker / Water vole (Arvicola amphibius) standing on hind legs sniffing blackberry, Kent, UK, September.

John Cancalosi / Coypu / Nutria amongst duckweed {Myocastor coypus} USA.

Andy Trowbridge / European beaver (Castor fiber) walking in snow. Southern Norway. February

Stephen Dalton / Yellow-necked mouse {Apodemus flavicollis} controlled conditions, UK

Orsolya Haarberg / Eurasian beaver (Castor fiber) scent marking, territorial behaviour, Telemark, Norway, June

Edwin Giesbers / Alpine marmot (Marmota marmota) reaching hands upwards, Hohe Tauern National Park, Austria, July

Edwin Giesbers / Close-up of Alpine marmot (Marmota marmota) fur and eye, Hohe Tauern National Park, Austria, July

Wild Wonders of Europe / Lesniewski / Alpine marmot (Marmota marmota) portrait, Hohe Tauern National Park, Austria, July 2008

Edwin Giesbers / Barbary ground squirrel (Atlantoxerus getulus) female on side of palm line road, Fuerteventura, Canary Islands. Introduced from North Africa.

Sam Hobson / Barbary ground squirrel (Atlantoxerus getulus) in arid mountain habitat. Fuerteventura, Canary Islands, Spain. April.

Nature Production / Siberian flying squirrel (Pteromys volans) gliding.