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November 18, 2012 in City
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To avoid compromising his night vision, Patrick Graham with Defenders of Wildlife uses a red LED on his headlamp to check a map while bivouacked on a ridge near Adrian Alvarado Baldeon’s herd of sheep on Sept. 10 near Sun Valley, Idaho. Graham spends many nights near sheep herds, employing nonviolent means such as air horns, searchlights and fladry to deter the Pioneer Pack from attacking.

Peruvian sheepherder Adrian Alvarado Baldeon is bathed in early morning light on Sept. 13 as he drives sheep from the ridge where he beds them to a nearby river.

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Baldeon’s herd of 1,500 sheep kicks up a cloud of dust as it heads for water on the morning of Sept. 13.

A group of Sun Valley bikers out for a morning ride pause to watch Baldeon and his herding dogs as they water sheep on Sept. 13.

An infrared camera near Sun Valley captured this image of four members of the Pioneer Pack on Oct. 12.

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Adrian Alvarado Baldeon grins as he and his two herding dogs drive 1,500 sheep from a ridge where they slept on Sept. 13.