Donald M. Jones / Bighorn Sheep (Ovis canadensis) ewe and ram, western Montana

Michael Quinton / Dall's Sheep (Ovis dalli) ram, lamb, and ewe, Yukon Territory, Canada

Donald M. Jones / Bighorn Sheep (Ovis canadensis) rams, ewe, and lamb, western Canada

Donald M. Jones / Bighorn Sheep (Ovis canadensis) ewes and lambs grazing, western Canada

Sumio Harada / Bighorn Sheep (Ovis canadensis) rams pursuing ewe in snowstorm, Glacier National Park, Montana

Donald M. Jones / Bighorn Sheep (Ovis canadensis) ram and ewe during rut, Montana

Laurie Campbell / Black-faced sheep (Ovis domesticus) ewe with lamb, Lanarkshire, Scotland, April

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...

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

Colin Seddon / Jacob sheep {Ovis aries} ewe standing in a field, UK.

Colin Seddon / Crossbred ewe and lamb - domestic sheep {Ovis aries} Shetland Is, Scotland, UK