Donald M. Jones / Red Squirrel (Tamiasciurus hudsonicus) on pine cone flakes, western Montana
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George Sanker / Male North American red squirrel (Tamiasciurus hudsonicus) alarm calling, Yellowstone National Park, Wyoming, USA, June
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Michael Quinton / Red Squirrel (Tamiasciurus hudsonicus) four young at entrance to their nest in a tree cavity, Alaska
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Sumio Harada / Red Squirrel (Tamiasciurus hudsonicus) separating seeds from an Engelmann Spruce (Picea engelmannii) cone to store for winter food, Rocky Mountains, Alberta, Canada
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Sumio Harada / Red Squirrel (Tamiasciurus hudsonicus) mother returning to her 35 day old babies in nest to nurse them, Rocky Mountains, North America
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Sumio Harada / Red Squirrel (Tamiasciurus hudsonicus) climbing tree, Rocky Mountains, North America
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Sumio Harada / Red Squirrel (Tamiasciurus hudsonicus) curious 40 day old babies peer out from nest in tree trunk, Rocky Mountains, North America
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Sumio Harada / Red Squirrel (Tamiasciurus hudsonicus) mother nursing her 19 day old babies in nest in tree trunk, Rocky Mountains, North America
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Sumio Harada / Red Squirrel (Tamiasciurus hudsonicus) mother nursing her 15 day old babies in nest, Rocky Mountains, North America
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Sumio Harada / Red Squirrel (Tamiasciurus hudsonicus) mother nursing babies in nest, Rocky Mountains, North America
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Sumio Harada / Red Squirrel (Tamiasciurus hudsonicus) standing on branch, Rocky Mountains, North America
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Sumio Harada / Red Squirrel (Tamiasciurus hudsonicus) mother protecting territory near her nest from other squirrels, Rocky Mountains, North America
