Gerrit Vyn / Dall sheep (Ovis dalli) yearling lamb running across alpine tundra, Denali National Park, Alaska, USA

Brent Stephenson / Domestic Sheep (Ovis aries) ewe and two lambs, probably Romney x Perendale. Unshorn. Cape Kidnappers, Hawkes Bay, New Zealand, September.

Diane McAllister / Female Rocky Mountain bighorn sheep ewe (Ovis canadensis canadensis) warning her newborn lamb that a rocky ledge is too close and dangerous. She places her front hoof on the baby's back, stopping it f...

Juan Carlos Munoz / Sheep (Ovis aries) and lambs in a pasture. Sierra de Andujar Natural Park, Jaen, Andalusia, Spain, April 2010

Ernie Janes / Domestic sheep, ewe with two lambs, running, Norfolk, UK, March

Ernie Janes / Domestic sheep, lambs playing in field, Goosehill Farm, Buckinghamshire, UK, April 2005

Ernie Janes / Domestic sheep, lambs playing in a field, Norfolk, UK, March

Wild Wonders of Europe / Geidemark / Shepherd carrying two lambs with a sheep following, Lake Prespa National Park, Albania, June 2009

Juan Carlos Munoz / Shetland sheep lambs on coastal land, Hermaness Nature Reserve, Unst Island, Shetland Islands, Scotland, UK

Peter Lewis / Two Lambs in field being affectionate, Dorset, UK

Artur Tabor / Two newborn lambs (Ovis aries) in grass field

Sumio Harada / Bighorn Sheep (Ovis canadensis) ewe and lambs, Glacier National Park, Montana

Sumio Harada / Bighorn Sheep (Ovis canadensis) ewe and lambs, Glacier National Park, Montana

Sumio Harada / Bighorn Sheep (Ovis canadensis) ewe and lambs climbing on cliff, Glacier National Park, Montana

David Kjaer / Shepherd with sheep and lambs (Ovis aries). North Yorkshire, UK, April.

Ernie Janes / Kerry Hill sheep flock Ewe and two lambs

Ernie Janes / Domestic sheep (Ovis aries) lambs playing in meadow, Norfolk, UK, April.

Ernie Janes / Domestic sheep (Ovis aries) two lambs playing in meadow, Norfolk, UK, April.

Ernie Janes / Domestic sheep (Ovis aries) three lambs playing in meadow, Norfolk, UK, April.

Ernie Janes / Domestic sheep (Ovis aries) lambs in meadow playing, with one standing on Ewe, Norfolk, UK, March.

Ernie Janes / Domestic sheep (Ovis aries) lambs in meadow playing, with one standing on Ewe, Norfolk, UK, March.

Ernie Janes / Domestic sheep (Ovis aries) lambs in meadow playing, with one standing on Ewe, Norfolk, UK, March.

Ernie Janes / Domestic sheep (Ovis aries) lambs in meadow with Ewe, Norfolk, UK, March.

Ernie Janes / Domestic sheep (Ovis aries) lambs in meadow playing, with one sitting on Ewe, Norfolk, UK, March.

Ernie Janes / Domestic sheep (Ovis aries) lambs in meadow playing, with one jumping on Ewe, Norfolk, UK, March.

Ernie Janes / Domestic sheep (Ovis aries) lambs in meadow playing, with one standing on Ewe, Norfolk, UK, March.

Ernie Janes / Domestic sheep (Ovis aries) lambs in meadow playing, with one standing on Ewe, Norfolk, UK, March.

Ernie Janes / Domestic sheep (Ovis aries) lambs in meadow playing, with one standing on Ewe, Norfolk, UK, March.

Ernie Janes / Domestic sheep (Ovis aries) lambs in meadow playing, with one standing on Ewe, Norfolk, UK, March.

Ernie Janes / Domestic sheep (Ovis aries) lambs in meadow one jumping off ewe's back, Norfolk, UK, March.

Ernie Janes / Domestic sheep (Ovis aries) lambs in meadow playing with one standing on Ewe, Norfolk, UK, March.

David Woodfall / Mother with young child enjoying spring lambs and ewe in community city farm

David Woodfall / Mother with spring lambs and ewe at Swansea city farm, Swansea, April 2009.

David Woodfall / Domestic sheep (Ovis aries) two spring lambs, sitting portrait on grass saltmarsh, England, UK.

David Woodfall / Domestic sheep (Ovis aries) two spring lambs sitting with adult grazing, living on grass saltmarsh, England, UK.

Gerrit Vyn / Dall sheep (Ovis dalli) ewe and lambs, Denali National Park, Alaska, USA

Colin Monteath / Domestic Sheep (Ovis aries) with twin lambs, Stony Bay, Banks Peninsula, Canterbury, New Zealand

Colin Monteath / Domestic Sheep (Ovis aries) and twin lambs, Flea Bay, Banks Peninsula, Canterbury, New Zealand

Brent Stephenson / Domestic Sheep (Ovis aries) ewe and two lambs, probably Romney x Perendale. Unshorn. Cape Kidnappers, Hawkes Bay, New Zealand, September.

Adrian Davies / Shetland Sheep (Ovis aries) cleaning new-born lamb. Shetland, Scotland, April.

George Sanker / Bighorn Sheep (Ovis canadensis) lambs. Yellowstone National Park, Wyoming, USA, June.

George Sanker / Bighorn Sheep (Ovis canadensis) lambs playing. Yellowstone National Park, Wyoming, USA, June.

Peter Cairns / 2020VISION / Two Lambs, silhouetted at sunset, Balranald, North Uist, Western Isles / Outer Hebrides, Scotland, UK, May

Kim Taylor / Lambs resting by a tree trunk in late spring. Surrey, UK, June.

Kim Taylor / Lamb resting on a field in late spring. Surrey, UK, June.

Kim Taylor / Lamb, 1 week, in a field. Surrey, UK, May.

Nick Upton / Bovec sheep (Ovis aries) lamb resting on high altitude pastureland at 1600m in the Julian Alps near Bohinj, Triglav National Park, Slovenia, July.

Orsolya Haarberg / Sheep and lamb on the top of the Lundeura (Lovund, Luroy), with sea fog and Tomma (Nesna) in the background, Helgeland, Nordland, Norway, July 2009

Philippe Clement / The Colbost Croft Museum / Folk Museum showing nineteenth century Hebridean crofter's black house on the island of Skye, Inner Hebrides, Scotland, UK, May 2010

Ernie Janes / Domestic sheep, four Texel lambs together in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, ewe with two lambs, Norfolk, UK, March

Ernie Janes / Domestic sheep, group of lambs playing on feeding trough, Norfolk, UK, March

Ernie Janes / Domestic sheep, ewe with three lambs climbing all over her, Norfolk, UK, March

Ernie Janes / Domestic sheep, ewe with two lambs, Norfolk, UK, March

Ernie Janes / Domestic sheep, two lambs interacting in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, ewe with two lambs, one resting on her, Norfolk, UK, March

Ernie Janes / Domestic sheep, three lambs playing on feeding trough, Norfolk, UK, March

Ernie Janes / Domestic sheep, ewe with two lambs playing, standing on her back, Norfolk, UK, March

Ernie Janes / Domestic sheep, group of lambs together in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, ewe with two lambs, one standing on her, Norfolk, UK, March

Ernie Janes / Domestic sheep, lambs playing in field, Goosehill Farm, Buckinghamshire, UK, April 2005

Ernie Janes / Domestic sheep, lambs playing in field, Goosehill Farm, Buckinghamshire, UK, April 2005

Nick Upton / Herd of domestic sheep (Ovis aries) resting in the shade of a Norway maple tree (Acer platanoides) on a hot summer day. Gloucestershire, UK, June 2010

Ernie Janes / Domestic sheep, ewe with two lambs, Norfolk, UK, March

Ernie Janes / Domestic sheep, three lambs together in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, Texel lambs together in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, lambs playing in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, Texel lambs resting in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, ewe and two lambs in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, ewe with two lambs, Norfolk, UK, March

Ernie Janes / Domestic sheep, two lambs play head-butting in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, lambs playing in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, two lambs playing on feeding trough, Norfolk, UK, March

Ernie Janes / Domestic sheep, ewe with three playful lambs, Norfolk, UK, March

Ernie Janes / Domestic sheep, ewe with two lambs, Norfolk, UK, March

Ernie Janes / Domestic sheep, Texel lambs playing in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, lambs playing in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, ewe with two lambs, Norfolk, UK, March

Ernie Janes / Domestic sheep, ewe with two lambs, Norfolk, UK, March

Ernie Janes / Domestic sheep, two Texel lambs playing in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, group of five Texel lambs together in a field, Norfolk, UK, March

Ernie Janes / Domestic sheep, Texel lambs playing in hay feeder in field, Norfolk, UK, March

Ernie Janes / Domestic sheep, lambs playing in field, Goosehill Farm, Buckinghamshire, UK, April 2005

Ernie Janes / Domestic sheep, lambs playing in field, Goosehill Farm, Buckinghamshire, UK, April 2005

Aflo / ic-07105 Sheep with two lambs {Ovis aries}

Eric Baccega / Ewes and lambs (Ovis aries) grazing on Ouessant Island, Ile Bretonne, Bretagne, France

Stephen Dalton / Ewe with two lambs, Spring, UK,

Patricio Robles Gil / Two Bighorn sheep (Ovis canadensis) lambs in snow, Yellowstone National Park, Wyoming, USA, January

Patricio Robles Gil / Bighorn sheep (Ovis canadensis) lambs with a young males and females, Wild River Range, Wyoming, USA, January

Colin Monteath / Domestic Sheep (Ovis aries) newborn twin lambs with one grazing, Glenorchy, New Zealand

Laurie Campbell / Black-faced Ewe (Ovis aries) with lamb, Glen Shee, Cairngorms National Park, Scotland, UK, April

Jeff Vanuga / Rocky Mountain Bighorn Sheep {Ovis canadensis} ewes and lambs, Whiskey Basin, near Dubois, Wyoming, USA, November

Wild Wonders of Europe / Peltomäki / Texel sheep, Texel, Netherlands, May 2009

Wild Wonders of Europe / Rautiainen / Rear view of two Sheep with a lamb, Matsalu National Park, Estonia, May 2009

John Waters / Two lambs, probably twins, approx 5 weeks, in rolling pastureland, edge of Mendip Hills, Somerset, UK, Spring 2009