The Houston Audubon Society put the number of birds with some degree of oil on them at 60, about ten times the U.S. Coast Guard's initial estimate, and it now appears even that figure may be low.
"I just got out of my car and I immediately see five, six, seven birds with oil on them," Richard Gibbons, a biologist with the Houston Audubon Society, said Monday.
About 50,000 birds and more than 50 species call the Bolivar Flats Shorebird Sanctuary home. The sanctuary is about three miles from the initial accident site.
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