Photographer Charlie Riedel came across some oil-soaked pelicans today and made what I think are some of the most tragic images to come out of this event. (Update on June 4, 2010: Click here to see more of Riedel's pictures, and to hear him describe his experience on East Grand Terre Island.)

Charlie Riedel / AP
A Brown Pelican sits covered in oil on the beach at East Grand Terre Island along the Louisiana coast on Thursday, June 3. Oil from the Deepwater Horizon has affected wildlife throughout the Gulf of Mexico.