# Mass Seabird Die-off Hits California Coast Amid Warming Oceans Rising sea temperatures and El Niño drive thousands of seabirds to starvation. - **Source:** [La Presse](https://www.lapresse.ca) - **Published:** 2026-11-11 - **Topic:** [climate](https://brifing.si/c/climate) - **Original article:** - **On Brifing:** https://brifing.si/s/ae46f155-9daf-4936-82ff-b94e2443781f ## Unprecedented Seabird Mortality Thousands of seabirds have washed ashore along California's central coast in recent months, marking a severe ecological crisis. Between San Francisco and Los Angeles, rangers recorded over 1,900 dead birds and 750 requiring medical care since September. This figure represents a massive increase compared to the 120 birds recorded during the same period last year. ## The Role of Warming Waters Scientists attribute this die-off to record-breaking ocean temperatures, which have surged up to 13 degrees Fahrenheit above average in areas like Monterey Bay. These thermal anomalies are exacerbated by the El Niño phenomenon. Consequently, essential prey species like anchovies and rockfish have migrated to deeper, cooler waters, leaving surface-dwelling birds without food. ## Common Murres Most Affected Common murres, distinctive black-and-white birds that dive for food, are the primary victims of this starvation event. These birds typically spend most of their lives at sea, making their presence on beaches highly unusual. Local wildlife clinics report that nearly all admitted murres are suffering from severe emaciation due to lack of prey. ## Wildlife Rescue Under Pressure The Pacific Wildlife Care clinic in Morro Bay has treated more seabirds this year than at any point in its 40-year history. Since September, the facility has admitted 924 murres, a staggering jump from the 24 birds seen during the same timeframe last year, highlighting the unprecedented scale of this ongoing environmental emergency. ## Ecological Warning Signals Experts describe these birds as the 'canary in the coal mine' for ocean health. The warming waters are not only impacting birds but also threatening indigenous species like giant kelp and sea lions. This shift in the marine ecosystem suggests that the current environmental conditions are becoming unsustainable for many native coastal inhabitants. ## Historical Context of Die-offs This event mirrors a similar crisis from a decade ago when a marine heatwave coincided with El Niño. During that period, approximately 4 million common murres perished in Alaska, marking the largest single-species mortality event in modern history. Scientists fear that current conditions could lead to further significant losses across multiple marine species. ## Uncertainty Regarding Future Trends Researchers admit that the full scope of this event remains unclear as the situation continues to unfold. While warming waters are a primary driver, scientists are still investigating whether additional factors are pushing fish populations away from traditional feeding grounds. There is no consensus on when or if ocean conditions will return to normal. ## Broader Environmental Implications The crisis underscores the vulnerability of marine life to rapid climate shifts. As El Niño intensifies this winter, experts anticipate that the mortality rate could rise further. This event serves as a stark indicator of the profound, often invisible, changes occurring beneath the surface of the Pacific Ocean due to global climate trends. ## Sources covering this story - https://www.lapresse.ca/actualites/environnement/2026-11-11/californie/pourquoi-des-milliers-d-oiseaux-marins-se-sont-ils-echoues-sur-la-cote.php?utm_source=rss&utm_medium=fil&utm_campaign=actualites — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._