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Gray Whales Enter San Francisco Bay More Often
Gray whales are entering San Francisco Bay in greater numbers and staying longer during their annual migration. Scientists link the change to climate conditions. Last year the Bay Area recorded its highest number of gray whale deaths in 25 years.
May 21, 5:14 PM·1m read1 source
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Gray whales have long migrated along the California coast on their roughly 12,000-mile (19,300-kilometer) journey between breeding lagoons in Mexico and feeding grounds in the Arctic. Instead of simply passing offshore, increasing numbers are now diverting into San Francisco Bay and lingering for days or even weeks inside the crowded estuary.
Scientists increasingly link the shift to climate change.
Last year, 21 dead gray whales were found in the wider Bay Area. The Marine Mammal Center reported that this was the highest number in 25 years. At least 40% of the deaths were caused by ship strikes.
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