San Francisco Bay Area birds contaminated by mysterious substance

San Francisco Bay.

San Francisco Bay. Image by nestor ferraro / CC BY 2.0

At least 80 birds have died and dozens of others have been left ill after being contaminated by a mysterious substance in the San Francisco Bay Area. Experts can’t identify what the material is that’s affecting birds along the eastern shore of the Bay near Alameda. They don’t believe it’s toxic but think that the deaths are caused by the substance stopping the birds’ natural insulation. Read more:

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