In 2002 the world’s governments made a commitment to reduce the rate of biodiversity loss by 2010. State of the world’s birds provides a progress report, based on birds. The messages are mixed. We know more, and have identified clearer actions, than in even our last assessment in 2004. Global awareness of the issues and their urgency is growing. Yet the state of the world’s biodiversity, reflected by its birds, is still getting worse – and faster than ever. Birds are sounding the alarm: it’s time to listen, and make real and positive changes.