Malnutrition, ship strikes likely cause of spate of whale strandings
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Gray Whales Are Dying Along the Pacific Coast
The threat from vessel strikes - Whale & Dolphin Conservation Australia
Spike in Gray Whale Deaths Triggers Investigations (U.S. National Park Service)
Ship Strikes with Animals More Common as Boating Grows
As gray whale migration reaches its peak, scientists fear another unexplained die-off - Los Angeles Times
Ships pose great danger for migrating whales
A Sign of What's to Come? — The Planet Magazine
Spike in Gray Whale Deaths Triggers Investigations (U.S. National Park Service)
Whales Atypical Mass Strandings are Caused by Naval Sonar - Underwater360
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