While today's spill appears to be relatively small (at this point), officials are saying that it's unlikely that no birds will be affected. Then there's this, from the latest coverage in the Chronicle:

Lt. Rob Roberts, of the Department of Fish and Game, said state officials had found no evidence of oil on birds or other wildlife by late this afternoon. But a helicopter hovering over the spill at about 10 a.m. reported seeing birds diving into the oil slick, said Sylvia Wright, a spokeswoman for the Oiled Wildlife Care Network, which has been mobilized to do reconnaissance and recovery of oiled birds and other wildlife. "We do expect that there will be birds that need to be rescued," Wright said. Anyone who sees oiled wildlife should call (877) 823-6926, she said.