Seabirds in the western Indian Ocean are eating a lot of plastic. Researchers looked at the stomach contents of 222 birds from nine different species. They found that tropical shearwaters and Barau's petrels were the most affected. Barau's petrels had more plastic in their stomachs than tropical shearwaters. Even young birds had more plastic than adults. This shows that the areas where these seabirds hunt for food are very polluted with plastic. In Reunion Island, many birds are dying because they are attracted to city lights. The researchers suggest using these birds to keep track of how much plastic is in the ocean over time.