An oil spill by the site of a sunken shadow tanker next to Russia’s ecologically sensitive Black Sea shore has killed more than 500 birds and hundreds more are too contaminated to survive, a Russian wildlife protection group announced on Sunday. Portions of a 100-square-kilometer (38.6-square-mile) slick had come ashore near the Russian resort city Anapa over the weekend and rescue teams had found, washed ashore with bitumen and crude, hundreds of waterfowl unable to fly, walk or swim, the