Fact Sheet
Orca

Threats to Orcas

Recent studies have found that orcas are amongst the most contaminated marine mammals in the world. Pollution and chemical contamination make orcas more susceptible to disease and likely cause reproductive difficulties.

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Orca, © Sethakan/istockphoto
Defenders Event
The U.S. Army Corps of Engineers, the Bureau of Reclamation and the Bonneville Power Administration are drawing up a revised plan for long-term management of the Columbia River system – and this new plan will impact orca and their main prey, salmon, for years to come.
Orca, © Tory Kallman
Defenders Event
The U.S. Army Corps of Engineers, the Bureau of Reclamation and the Bonneville Power Administration are drawing up a revised plan for long-term management of the Columbia River system – and this new plan will impact orca and their main prey, salmon, for years to come.
Orca, © Dave Ellifrit/Center for Whale Research/NMFS Permit 15569/DFO SARA 272
In the Magazine
Compromised by pollution, with their fate tied to a fish, the orcas of Puget Sound struggle to hang on