Hanne Tersmette, spokesperson for Bird Protection: “Species such as the blackbird and song thrush are really declining in numbers. Some to more than 5 percent per year. These are birds that like to build their nest in bushes or look for food in a green environment. ” According to Tersmette, this is because their green habitat is getting smaller, for example because people tile their gardens or municipalities remove the ‘messy’ corners where birds like to hide. “So there’s simply no place for them to live, forage for food and build their nest.”