Fig 1. Study area of northwest Alaska, 2012–2013.

White circles with black stars inside represent fecal pellet sample site locations. The black and white dashed line represents the extent the Western Arctic Herd range. In 2012, caribou moved outside this boundary to the southeast. White line (67.1° N) generally separates sites south of the Brooks Range from those within it, dark squares are villages, and black lines are roads.