Fom Portland Audubon: East Sand Island was once the largest Double-crested Cormorant colony in the world, home to more than 28,000 cormorants representing 40 percent of the entire population west of the Rocky Mountains. However, for the past three years, federal agencies have been waging a relentless and inhumane war on Double-crested Cormorants, shooting thousands of the birds out of the sky with shotguns and destroying their active nests. More than 5,000 cormorants have been shot, and more than 6,000 nests have been destroyed. Because of this, the world’s largest colony of Double-crested Cormorants has collapsed. The birds abandoned the colony at the peak of nesting season in 2016, and only a couple hundred birds returned to nest in 2017.
The collapse of the entire colony went far beyond what was allowed under the Corps permits and puts the entire western population of Double-crested Cormorants at risk. Yet, the US Army Corps has applied for permits to continue destroying cormorant nests on East Sand Island if the birds return in 2018, and has plans to modify their habitat to limit nesting in the future. This kind of activity could precipitate another colony collapse in 2018.