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White pelicans and riparian vegetation, Yellowstone River, Montana
American White Pelicans (Pelecanus erythrorhynchos) on a gravel bar of the Yellowstone River, east of Billings, Montana. The fish supports abundant fish prey for the birds. In the background is luxurious riparian vegetation (cottonwoods, willows, etc.) that lines much of the river.
"Limnology" - The study of inland waters
Photo: 2 August 2013