Birds said harmed by pollutant off coast of England WEST HATCH, England, Feb. 2 (UPI) -- Animal activists in Britain say almost 200 birds have washed ashore covered in a waxy oil, likely from an oil spill off the country's southern coast. Staff at the Royal Society for the Prevention of Cruelty to Animals center in West Hatch say they have taken in about 170 live birds covers in the oily substance since Tuesday, The Daily Telegraph reported. It is like a silicone sealer. The best way I can think to describe it is 'sticky Vaseline,'" said RSPCA deputy chief inspector John Pollock. Volunteers at the center are working to clean the surviving birds while RSPCA animal collection officers said they have seen hundreds of dead birds washed up along the southern coastline. The Environment Agency is looking into what the substance that is covering the birds is and where is may have come from, the newspaper said. The agency took samples from the affected water to establish the cause of the pollution. "The results show that it is a refined mineral-based oil mixture, but not from an animal or vegetable-based oil, which rules out palm oil," an Environment Agency spokesman said.