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Angler & his dog fishing a riffle on the Yellowstone River below Living
An angler fly casts for rainbow and brown trout on the Yellowstone River below the town of Livingston Montana. The river was warm (72 F; 22 C), and fishing was poor, as trout don't feed very much at such high temperatures, because they have insufficient oxygen to digest their food.
Photo by Linda L'Ai
Limnology - the study of inland waters
Photo: 3 August 2013