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The Caspian Tern Colony in the Columbia River Estuary

Jun 1, 2014


An artificial island near the mouth of the Columbia River that was created by the US Army Corps of Engineers has had the inadvertant consequence of creating the perfect nesting conditions for two bird species, both of which prey on juvenile salmon and steelhead. Caspian terns (pictured here) and double-crested cormorants consume 1 in 5 smolts making their way to the ocean. Inside learn more about this growing problem.