The mystery surrounding the hundreds of seabirds found coated in an unknown, gooey substance along the eastern San Francisco Bay shoreline took a twist this week with the discovery of several more birds along the San Mateo County coast to the west. . . Deb Self, executive director of San Francisco Baykeeper, said it appears the birds were contaminated around Thursday evening, though it remains unclear what incident may have caused the contamination.
Mystery substance now found on seabirds on west side of Bay
San Francisco Examiner