Tags: US | Gulf | Oil | Spill | Major | Nesting | Area

Oil Hits Louisiana's Largest Seabird Nesting Area

Thursday, 15 Jul 2010 07:27 AM

 

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Biologists say oil has smeared at least 300-400 pelicans and hundreds of terns in the largest seabird nesting area along the Louisiana coast — marking a sharp and sudden escalation in wildlife harmed by BP's Gulf of Mexico oil spill.

The finding underscores that official tallies of birds impacted by the spill could be significantly underestimating the scope of damage.

The government counts only oiled birds collected for rehabilitation or found dead, for use as evidence in the spill investigation. Oiled birds in the many nesting areas that dot the Gulf coast typically are left in place and not counted in official tallies.

Researchers from the Cornell Lab of Ornithology said Wednesday that they had spotted the oiled pelicans on Raccoon Island over the past several days. The spit of land lines the Gulf outside the state's coastal marshes. An estimated 10,000 birds nest on the island in Terrebonne Parish.

U.S. Fish and Wildlife Service biologist Lisa Williams said state and federal observers had documented only 68 oiled pelicans on Raccoon Island.

Biologist Marc Dantzker with Cornell — considered one of the nation's premier institutions for bird research — said about 30 to 40 of the pelicans spotted by his group were oiled "head-to-tail." Many more had visible blotches of oil.

Dead birds also were seen, although no count was available for those.

"This is a major oiling event of an incredibly important seabird colony," Dantzker said. "Many of these birds will be dead soon — weeks and months. These blotches are deadly."

Even a small amount of oil can kill birds because it hampers their ability to regulate their body temperature.

The Raccoon Island colony was established by the state in the 1980s. Its successful expansion epitomized restoration efforts that brought brown pelicans off the endangered species list last year.

Oil from the spill 50 miles off the coast hit the island on July 10, after Hurricane Alex drove high seas into the region as it passed to the south, according to Louisiana officials. And with millions of gallons of crude still at sea it could be hit again.

"This is not like Exxon Valdez where you had tens of thousands of birds killed all at once," said Ken Rosenberg, director of conservation science at the Cornell laboratory. "It's more insidious because it is literally happening in waves and it's happening over and over again as the birds are moving around."

Dantzker said he was surprised the government's number was so low and speculated that they used a different method to count oiled birds.

"Come out and look with us," he said. "If you're on the island and using binoculars you will see those birds."

Across the Gulf, roughly 3,000 killed or oil-covered birds have been collected by wildlife agencies since BP's Deepwater Horizon drilling rig exploded and sank on April 20, killing 11 workers.

Williams, the wildlife official, declined to say how many more birds that were not collected might have oil on them. She said those figures were being compiled, but the results would not be available for some time.

As has been the case with other nesting colonies, Williams said her agency did not plan to rescue the oiled birds from Raccoon Island because that could disrupt other birds in the colony. Entering a colony can flush nesting birds and lead to adults inadvertently killing their young.

"We don't want to cause more harm than good," Williams said.

© Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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