BP oil spill disrupted many pelican nesting sites BP oil spill disrupted many pelican nesting sites Bob Marshall / The Lens -- The one island still large and high enough to hold mangroves is still used by several hundred pelicans, roseate spoonbills, herons and other birds. But as this image shows, some of the mangroves are still dying from the oil. Before the spill, an estimated 10,000 pelicans and other birds used the barrier islands. Barrier islands wash away as oil kills off mangrove patches Bob Marshall| The Lens April 18, 2014 Comments On a bright spring morning, P.J. Hahn was walking through a graveyard in the middle of Barataria Bay. It was a 30-yard patch of mud and sand bristling with bare, dead mangrove brush surrounded by miles of open water. Each mangrove was a tombstone marking the death of a nesting site used for decades by brown pelicans and roseate spoonbills on what was once the string of wetland pearls that made up the Cat Islands chain. But in 2010 the oil spewing from BP’s Deepwater Horizon well would send them all to an early grave. This story was originally published by The Lens, an independent, nonprofit newsroom serving New Orleans. Continue reading full story here.