Bear River Slough
This is the slough or wetlands of Cokeville Meadows National Wildlife Refuge in western Wyoming. A slough can form when a meander gets cut off from the main river channel creating an oxbow lake that accumulates with fine over-bank sediment and organic material such as peat.
This wetland or swamp environment (such as shown in the image above) is on one end of the oxbow configuration and continues to receive flow from the main channel, creating a slough or as in the case of the Cokeville Meadows, a wetland marsh. For the full story on this image visit the corresponding page on Where Eagles Fly